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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant Date Fair Value RSUs, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted Average Grant Date Fair Value RSU Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisWithUnobservableInputs_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate fair value of PIPE Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preferred Stock, Shares Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExtendedSubleaseTermDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Extended Sublease Term Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExtendedSubleaseTermDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Extended Sublease Term Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExtendedSubleaseTermDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Extended sublease term description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accounts Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revision of Prior Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashFlowNoncashInvestingAndFinancingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental disclosure of noncash investing and financing activities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">P I P E Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PIPE warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 PIPE Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2021 PIPE Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SurrozenIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Surrozen Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SurrozenIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Surrozen Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SurrozenIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Surrozen Inc Member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SurrozenIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Surrozen Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Warrant Exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromWarrantExercises_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock upon exercise of warrants</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DocumentDocumentAndEntityInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document - Document and Entity Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DocumentDocumentAndEntityInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Document And Entity Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DocumentDocumentAndEntityInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Document Document And Entity Information Abstract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Investment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductOrServiceAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GrossProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Proceeds From Issuance Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GrossProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gross Proceeds From Issuance Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GrossProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Proceeds From Issuance Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary equity shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Temporary equity, Balance at the beginning (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Temporary equity, Balance at the end (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash and Cash Equivalents, at Carrying Value, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash and Cash Equivalents, at Carrying Value, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GeneralAndAdministrativeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GeneralAndAdministrativeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GeneralAndAdministrativeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">General and Administrative [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four PIPE Warrants Series A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four PIPE Warrants Series A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 PIPE Warrants - Series A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Litigation Settlement, Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LitigationSettlementExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities related to indemnification obligations or litigation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsidiary Sale Of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiarySaleOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary, Sale of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Arrangement, Contract to Perform for Others, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Arrangement, Contract to Perform for Others, Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Common Stock, Shares, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ATMProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ATMProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ATMProgramMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ATM Program [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InterestAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest and other receivables.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InterestAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest And Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InterestAndOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest and other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_Issuanceofcommonstockvalueunderequitypurchaseagreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock value under equity purchase agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_Issuanceofcommonstockvalueunderequitypurchaseagreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IssuanceOfCommonStockValueUnderEquityPurchaseAgreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_Issuanceofcommonstockvalueunderequitypurchaseagreement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock under employee stock purchase plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition, Acquiree</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAcquireeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted Average Exercise Price Expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued financing costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities and stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Exercise Price Options Outstanding and Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ScheduleOfRestructuringAndRelatedCosts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Costs [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToTerminate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease option to terminate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToTerminate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Option to Terminate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestructuringEndiningBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Restructuring ending balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestructuringEndiningBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring endining balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestructuringEndiningBalance_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restructuring endining balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Pipe Warrants Series E One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Pipe Warrants Series E One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 PIPE Warrants - Series E One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares issued, price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssuedPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfClassOfWarrantsIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of Class Of Warrants Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfClassOfWarrantsIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class Of Warrants Issued, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfClassOfWarrantsIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Of Class Of Warrants Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Goodwill, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Goodwill, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Goodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Goodwill, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockWarrantsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for common stock warrants.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Years [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Years [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Two Years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2 years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherDepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Depreciation and Amortization</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted Cash</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnauditedCondensedConsolidatedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unaudited Condensed Consolidated Financial Statements Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnauditedCondensedConsolidatedFinancialStatementsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unaudited Condensed Consolidated Financial Statements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ChangeInFairValueOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of tranche liability</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ChangeInFairValueOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Change In Fair Value Of Tranche Liability</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwentyFourMonthsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty Four Months [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwentyFourMonthsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Twenty Four Months</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwentyFourMonthsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">24-month</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossDerivativeQualifyingAsHedgeExcludedComponentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Other Comprehensive Income (Loss), Derivative Qualifying as Hedge, Excluded Component, Including Portion Attributable to Noncontrolling Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedOtherComprehensiveIncomeLossDerivativeQualifyingAsHedgeExcludedComponentIncludingPortionAttributableToNoncontrollingInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Other Comprehensive Income (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Employee Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedEmployeeBenefitsCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued payroll and related expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CollaborationAndLicenseAgreementWithBiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collaboration and License Agreement with BI [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CollaborationAndLicenseAgreementWithBiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaboration and License Agreement with BI [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CollaborationAndLicenseAgreementWithBiMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaboration and License Agreement with BI [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRiskFreeInterestRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Risk Free Interest Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SalesAgreementTerminatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sales Agreement Terminated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SalesAgreementTerminatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sales Agreement Terminated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SalesAgreementTerminatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sales Agreement Terminated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Compensation Arrangement with Individual, Compensation Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Compensation excluding stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredCompensationArrangementWithIndividualCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Compensation excluding stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Options Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Operating Assets and Liabilities, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Other Operating Assets and Liabilities, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherOperatingCapitalNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share attributable to common stockholders, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss) per share available to (attributable to) common stockholders, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Number of Options Outstanding Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Options Outstanding Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value/shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsVestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four PIPE Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four PIPE Warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 PIPE Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesBCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesBCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series B Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesBCommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series B common stock warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net loss to net cash used in operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Changes in Fair Value of Warrant Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueLiabilitiesMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series D Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' equity (deficit):</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Plan Modification, Description and Terms</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of modification of options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardPlanModificationDescriptionAndTerms_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Description of modification of warrant vesting rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Retained Earnings (Accumulated Deficit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Retained Earnings (Accumulated Deficit), Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Retained Earnings (Accumulated Deficit), Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Accumulated deficit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Milestone Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Milestone Payment Received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Milestone payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nature of Operations [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NatureOfOperations_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization and Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsidiary Or Equity Method Investee Sale Of Stock By Subsidiary Or Equity Investee [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsidiaryOrEquityMethodInvesteeSaleOfStockBySubsidiaryOrEquityInvesteeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsidiary or Equity Method Investee, Sale of Stock, Type [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Options Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of options Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Price Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockPricePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Purchase price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreements [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreements [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License Agreements hypercube.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Based Compensation Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DisclosureOfCompensationRelatedCostsShareBasedPaymentsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series E Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series E Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E Common Stock Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeasesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Leases [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ProductsAndServicesDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Product and Service [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_OtherIncomeLossOnIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income Loss On Issuance Of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_OtherIncomeLossOnIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Other Income Loss on Issuance of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_OtherIncomeLossOnIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other expense, including loss on execution of the 2025 PIPE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionOtherEligibleItemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Option, Other Eligible Items [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueOptionOtherEligibleItemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value of Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shares into which warrant converted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerSharePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Loss Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities and stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash used in operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash used in Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net cash used in Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Operating Lease Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Exercise Price Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Year ending December 31, 2029</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Operating Income (Expense), Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherOperatingIncomeExpenseNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other segment items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Arrangement, Contract to Perform for Others, Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Arrangement, Contract to Perform for Others, Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedPaymentAwardStockOptionsValuationAssumptionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share-based Payment Award, Grant Date Using the Black-Scholes option-pricing model</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four PIPE Warrants Series B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four PIPE Warrants Series B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 PIPE Warrants- Series B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease right-of-use assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_StanfordMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stanford [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_StanfordMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stanford [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_StanfordMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stanford Member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreements [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License Agreements Line Items.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponExerciseOfStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issuable upon exercise of stock options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponExerciseOfStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Stock Issuable Upon Exercise of Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponExerciseOfStockOptionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Issuable Upon Exercise of Stock Options [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponWarrantExerciseShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon warrant exercise, (in share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponWarrantExerciseShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance Of Common Stock Upon Warrant Exercise, Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponWarrantExerciseShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance Of Common Stock Upon Warrant Exercise, Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentAndFacilityExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rent and facility expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentAndFacilityExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rent and Facility Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentAndFacilityExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rent and Facility Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentAndFacilityExpenses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Rent and facility expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Securities, Available-for-Sale [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtSecuritiesAvailableForSaleTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Marketable Securities by Security Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase in cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value of warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Adjustment of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAdjustmentOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive securities excluded from computation of diluted net loss per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetRelatedDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Balance Sheet Related Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Stock Purchase Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock Purchase Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EmployeeStockPurchasePlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee stock purchase plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromSaleOfShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds From Sale Of Shares</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, par value</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainDueTheCancellationOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain Due The Cancellation Of Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainDueTheCancellationOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain Due The Cancellation Of Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainDueTheCancellationOfWarrant_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain due the cancellation of Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series A Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series A Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesACommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series A Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First tranche [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Right-of-Use Asset, Periodic Reduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseRightOfUseAssetAmortizationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-cash operating lease expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Remaining Contractual Life (In Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted Average Remaining Contractual Life (In Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Remaining Contractual Life (In Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnIssuanceOfCommonStockPreFundedWarrantsAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss on issuance of common stock, pre-funded warrants and warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnIssuanceOfCommonStockPreFundedWarrantsAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss on issuance of common stock, pre-funded warrants and warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnIssuanceOfCommonStockPreFundedWarrantsAndWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss on issuance of common stock, pre-funded warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightPeriodForWhichWarrantsOrRightsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants or Rights Exercisable, Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightPeriodForWhichWarrantsOrRightsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Period for which Warrants or Rights Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightPeriodForWhichWarrantsOrRightsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of Warrant or Right, period for which Warrants or Rights Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExternalServices_lbl" xlink:role="http://www.xbrl.org/2003/role/label">External Services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExternalServices_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">External services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExternalServices_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consultants and third-party services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ExternalServices_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Consultants and third-party services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToPre-FundedWarrantsAndWarrantsIssuedInConnectionWithAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Costs Allocated To Pre-Funded Warrants And Warrants Issued In Connection With A Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToPre-FundedWarrantsAndWarrantsIssuedInConnectionWithAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction Costs Allocated To Pre-Funded Warrants And Warrants Issued In Connection With A Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToPre-FundedWarrantsAndWarrantsIssuedInConnectionWithAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs allocated to pre-funded warrants and warrants issued in connection with the 2025 PIPE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RelatedPartyServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Service Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RelatedPartyServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related Party Service Revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RelatedPartyServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related party research service revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnTerminationOfLease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Termination of Lease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DistributedBioSubscriptionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributed Bio Subscription Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DistributedBioSubscriptionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distributed Bio Subscription Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DistributedBioSubscriptionAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Distributed Bio Subscription Agreement Member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Restructuring Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherRestructuringCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Restructuring Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon option exercises, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of shares exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Common shares issued upon exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherPrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Others</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_DE_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GERMANY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_DE_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Germany</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_InterestEarningAssetsAverageYield_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest-Earning Assets, Average Yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_InterestEarningAssetsAverageYield_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest-Earning Assets, Average Yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockConversionBasis1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Converted preferred stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockConversionBasis1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Conversion Basis1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockConversionBasis1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock conversion basis 1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PipeInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pipe investors.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PipeInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pipe Investors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PipeInvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PIPE Investors</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liabilities Policy [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFiveStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Stock Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFiveStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Stock Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFiveStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 Stock Plan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedNonCurrentCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Non Current Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedNonCurrentCash_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted Non Current Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Marketable Securities, Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MembersOfManagementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Members Of Management [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MembersOfManagementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Members Of Management [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MembersOfManagementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Members Of Management [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Shares RSA, unvested, Ending Balance</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Shares Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GrossSalesCommissionsPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross sales commissions price</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GrossSalesCommissionsPrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gross Sales Commissions Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpensePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Expenses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Geographical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accounts Receivable, Related Parties</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccountsReceivableRelatedParties_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Accounts receivable -related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionCostOfAcquiredEntityTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Transaction Cost, Excluding Separately Recognized Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock upon option exercises</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Stock Options Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReductionInWorkforce_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduction in workforce</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReductionInWorkforce_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reduction in workforce</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReductionInWorkforce_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reduction in workforce</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Option [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockOptionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock Option</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Subsequent Events [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty One Public Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty One Public Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 Public Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RevenueRecognitionsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RevenueRecognitionsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognitions [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RevenueRecognitionsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for revenue recognitions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Marketable Securities, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MarketableSecuritiesPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marketable Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Assets, Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherAssetsNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Assets, Noncurrent, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Expected Term [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedTermMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Term (Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareByAntidilutiveSecuritiesAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantExercisePriceDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant, Exercise Price, Decrease</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantExercisePriceDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants reduced per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantExercisePriceDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants reduced per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Options Expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number of options Expired</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Options Cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExpirationsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Expirations in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriodTotalFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of RSU vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiabilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant Liability [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Stock-Based Compensation Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfCompensationCostForShareBasedPaymentArrangementsAllocationOfShareBasedCompensationCostsByPlanTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Cost by Plan [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Option to Extend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseOptionToExtend_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease option to extend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainLossUponExecution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain (loss) upon execution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainLossUponExecution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) Upon Execution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainLossUponExecution_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain (Loss) Upon Execution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, $0.0001 par value, 10,000 shares authorized; no shares issued and outstanding as of March 31, 2025 and December 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Preferred Stock, Value, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Preferred Stock, Value, Issued, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Preferred Stock, Value, Issued, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License agreements disclosure [Text Block].</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">License Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other intangible assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedIntangibleAssetsOtherThanGoodwill_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Intangible Assets, Other than Goodwill, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant Date Fair Value RSUs, Granted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrentAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Number of Securities Called by Each Warrant or Right</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightNumberOfSecuritiesCalledByEachWarrantOrRight_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase common stock,value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series E Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series E Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E Common Stock Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Purchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Securities Purchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SecuritiesPurchaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Purchase Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueAssetsAndLiabilitiesMeasuredOnRecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis [Table Text Block]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnExecutionOfAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss On Execution Of A Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnExecutionOfAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss On Execution Of A Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnExecutionOfAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Loss on execution of a private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnExecutionOfAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on execution of the 2025 PIPE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnExecutionOfAPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Loss on execution of the 2025 PIPE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring and Related</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringAndRelatedActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring and Related Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four PIPE Warrants Series C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four PIPE Warrants Series C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 PIPE Warrants - Series C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubleaseIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsReceivableNetCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable, after Allowance for Credit Loss, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and contingencies (Note 7)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Grant Date Fair Value RSA, Unvested Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted Average Grant Date Fair Value, RSA Unvested Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Issued under ESPP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C Common Stocks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series C Common Stocks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating lease liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Operating Lease, Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Reverse Stock Split</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityReverseStockSplit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reverse stock split, description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CompensationPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Compensation payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CompensationPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Compensation payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForAchievementOfSpecifiedDevelopmentAndRegulatoryMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments for achievement of specified development and regulatory milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForAchievementOfSpecifiedDevelopmentAndRegulatoryMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Achievement Of Specified Development And Regulatory Milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForAchievementOfSpecifiedDevelopmentAndRegulatoryMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments for achievement of specified development and regulatory milestones.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Lease, Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeLeaseDescriptionTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lessee Lease Description [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SuccessBasedMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Success-based milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SuccessBasedMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Success-based milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SuccessBasedMilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Success-based milestone payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOrEarnedRoyaltiesOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments for milestone agreement or earned royalties on achievement of milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOrEarnedRoyaltiesOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Milestone Agreement Or Earned Royalties On Achievement Of Milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOrEarnedRoyaltiesOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments for milestone agreement or earned royalties on achievement of milestones.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment and consolidated net lncome (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Segment and consolidated net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Segment and consolidated net loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lease Contractual Term [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LeaseContractualTermDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchaseOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase of additional shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchaseOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase of additional shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchaseOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase of additional shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EightYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eight years.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EightYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eight Years [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EightYearsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Eight Years [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average shares used in computing net loss per share attributable to common stockholders, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted-average shares used in computing net income (loss) per share available to (attributable to) common stockholders, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Aggregate Intrinsic Value Options outstanding and exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate Intrinsic Value Options outstanding and exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationArrangementsByShareBasedPaymentAwardTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of units upon PIPE Financing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfPrivatePlacement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Private Placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_VestingOfEarlyExercisesOfStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of early exercises of stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_VestingOfEarlyExercisesOfStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting Of Early Exercises Of Stock Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_VestingOfEarlyExercisesOfStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vesting of early exercises of stock options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToIssuedSharesOfCommonStockIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transaction Costs Allocated To Issued Shares Of Common Stock Included In Accrued And Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToIssuedSharesOfCommonStockIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transaction Costs Allocated To Issued Shares Of Common Stock Included In Accrued And Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TransactionCostsAllocatedToIssuedSharesOfCommonStockIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transaction costs allocated to issued shares of common stock included in accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the end</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the beginning</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total stockholders' equity (deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redemption Price Per Public Warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Redemption Price Of Warrants Or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class Of Warrant Or Right Redemption Price Of Warrants Or Rights.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche liability fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche Liability Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche Liability Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Tranche Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationAwardTrancheTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second tranche [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnvestedCommonStockSharesSubjectToRepurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested common stock subject to repurchase [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnvestedCommonStockSharesSubjectToRepurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unvested Common Stock Shares Subject To Repurchase [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnvestedCommonStockSharesSubjectToRepurchaseMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unvested Common Stock Shares Subject To Repurchase.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant liability.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss), Foreign Currency Transaction, before Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">(Gain) loss on foreign currency remeasurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on foreign currency remeasurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Loss (gain) on foreign currency remeasurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, Address Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockOtherValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Other Value, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockOtherValueOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock with the fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DevelopmentAndManufacturingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Development And Manufacturing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DevelopmentAndManufacturingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Development And Manufacturing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DevelopmentAndManufacturingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Development and manufacturing costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccruedLiabilitiesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Accrued Liabilities [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfTheWarrantAtInception_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Of The Warrant At Inception</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfTheWarrantAtInception_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fair Value Of The Warrant At Inception</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FairValueOfTheWarrantAtInception_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Of The Warrant At Inception</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche Liability Policy Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TrancheLiabilityPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche Liability Policy Text Block</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InProcessResearchAndDevelopmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InProcessResearchAndDevelopmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">In Process Research and Development [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plan Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PlanNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plan Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 PIPE Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five PIPE Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePIPEWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand twenty five PIPE warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainOnSettlementOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on settlement of tranche liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainOnSettlementOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain On Settlement Of Tranche Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainOnSettlementOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Gain On Settlement Of Tranche Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GainOnSettlementOfTrancheLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gain on settlement of tranche liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrants Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Warrants outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AreaOfRealEstateProperty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Area of Real Estate Property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AreaOfRealEstateProperty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Area of Real Estate Property</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RedeemableWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RedeemableWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RedeemableWarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redeemable warrant member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPaymentNetOfContractCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Upfront payment net of contract costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPaymentNetOfContractCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Upfront Payment Net of Contract Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UpfrontPaymentNetOfContractCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Upfront payment, net of contract costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number Of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUnderEquityPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock under Equity Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUnderEquityPurchaseAgreement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of common stock under Equity Purchase Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityBankruptcyProceedingsReportingCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Bankruptcy Proceedings, Reporting Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityBankruptcyProceedingsReportingCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Bankruptcy Proceedings, Reporting Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Public Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Public warrants.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 Public Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PublicWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">2021 Public Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreementShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock as a commitment fee under Equity Purchase Agreement, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreementShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of common stock as a commitment fee under Equity Purchase Agreement, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreementShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock under Equity Purchase Agreement, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerDurationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Duration [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Antidilutive Securities, Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AntidilutiveSecuritiesNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Antidilutive Securities, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, cash equivalents and restricted cash at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, cash equivalents and restricted cash at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Employee Service Share Based Compensation Allocation Of Recognized Period Costs [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Transfers of financial instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transfers of financial instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right, Exercise Price of Warrants or Rights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock warrants exercise price per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AllocatedShareBasedCompensationExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NoncashConsiderationReceivedInConnectionWithResearchServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Noncash consideration received in connection with research service revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NoncashConsiderationReceivedInConnectionWithResearchServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Noncash consideration received in connection with research service revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NoncashConsiderationReceivedInConnectionWithResearchServiceRevenue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Non-cash consideration received in connection with research service revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Number of Options outstanding and Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Units (RSUs) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedStockUnitsRSUMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unvested restricted stock units [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NonRefundableUpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-refundable upfront payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NonRefundableUpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-refundable upfront payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NonRefundableUpfrontPaymentReceived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non-refundable upfront payment received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VestingAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vesting [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase price per share of additional shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Price Per Share of Additional Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareOfAdditionalShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price of additional shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementClassOfStockAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four Pre Funded Warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 Pre-Funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NuraBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nura Bio [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NuraBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Nura Bio [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NuraBioMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nura Bio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Current Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrants Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodReclassificationAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period, Reclassification, Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RevisionOfPriorPeriodReclassificationAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revision of Prior Period, Reclassification, Adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrants Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of Warrants Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class of Warrants Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainsLossesOnExtinguishmentOfDebtAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Extinguishment of Debt [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series C Redeemable Convertible Preferred Stock.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series C Redeemable Convertible Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesCRedeemableConvertiblePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series C Redeemable Convertible Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueYearTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Year ending December 31, 2028</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IndefiniteLivedIntangibleAssetsMajorClassNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Indefinite-Lived Intangible Assets, Major Class Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted-average shares used in computing net loss per share attributable to common stockholders, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted-average shares used in computing net income (loss) per share available to (attributable to) common stockholders, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Act File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series D Common Stocks</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series D Common Stocks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesDCommonStocksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series D Common Stocks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Cancelled in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Cancelled in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of shared ,RSU, cancelled</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Expenses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseAndOtherAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockConversionBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, conversion basis</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentLiabilitiesOther_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Recognized Liability Assumed, Other Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalBalanceSheetDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Balance Sheet Components</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AssociatedWithholdingTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Associated withholding tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sale of Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNameOfTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalAndContractServicesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalAndContractServicesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional and Contract Services Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfessionalAndContractServicesExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Professional services</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">General and administrative</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">General and Administrative Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ContractWithCustomerDurationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Contract with Customer, Duration [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessCombinationAndAssetAcquisitionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoTranchePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Two-tranche private placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoTranchePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Tranche Private Placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoTranchePrivatePlacementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Tranche Private Placement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Milestone Payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Milestone Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_MilestonePayments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Milestone payment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue from Contract with Customer, Including Assessed Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research service revenue - related party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueFromContractWithCustomerIncludingAssessedTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total revenue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Arrangement, Contract to Perform for Others [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentArrangementContractToPerformForOthersLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and Development Arrangement, Contract to Perform for Others [Line Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_InvestorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GuggenheimSecuritiesLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Guggenheim Securities, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_GuggenheimSecuritiesLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Guggenheim Securities, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueHedgeIncludedInEffectivenessGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Fair Value Hedge, Included in Effectiveness, Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueHedgeIncludedInEffectivenessGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gain on change in fair value of tranche liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sublease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsToPurchaseCommonStock1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants To Purchase Common Stock 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsToPurchaseCommonStock1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants To Purchase Common Stock 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsToPurchaseCommonStock1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants to purchase common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Lease, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restructuring Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restructuring Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recently Adopted Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Recent Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Maturity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityMaturityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Lessee, Operating Lease, Liability, Maturity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of RSA Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSharebasedCompensationRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Conversion of Convertible Securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesConversionOfConvertibleSecurities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, shares purchased against warrant</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityFairValueAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Fair Value Adjustment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityFairValueAdjustment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduction in equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SublicensingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sublicensing Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SublicensingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublicensing Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SublicensingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Marketable securities deducting fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Shares, Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities, current portion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Lease, Liability, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Research and development expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research and development</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research and Development Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ResearchAndDevelopmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Research and Development Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NumberOfWarrantsVested_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Warrants Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NumberOfWarrantsVested_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of Warrants Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_NumberOfWarrantsVested_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of warrants vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Pipe Warrants Series E [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">TwoThousandTwentyFivePipeWarrantsSeriesE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 PIPE Warrants - Series E</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareAccompanyingCommonStockWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase Price Per Share Accompanying Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareAccompanyingCommonStockWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Price Per Share Accompanying Common Stock Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PurchasePricePerShareAccompanyingCommonStockWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price per share accompanying common stock warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock in a private placement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Stock Option Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Activity [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Four PIPE Warrants Series D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Four PIPE Warrants Series D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFourPipeWarrantsSeriesDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2024 PIPE Warrants - Series D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stockholders' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantNoticePeriodPriorToRedemptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant Redemption Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantNoticePeriodPriorToRedemptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Notice Period Prior To Redemption Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantNoticePeriodPriorToRedemptionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Redemption Period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Balance at the beginning (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Balance at the end (in shares)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityWarrantAssetsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Warrant Assets Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityWarrantAssetsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Warrant Assets Exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityWarrantAssetsExercisable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity warrant assets exercisable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RecapitalizationNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recapitalization Note [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RecapitalizationNoteAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Recapitalization</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStock2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStock2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Stock, 2.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Input, Expected Dividend Rate</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputExpectedDividendRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Dividend Yield</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedSalesCommissionCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Sales Commission</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Consideration Received Per Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockConsiderationReceivedPerTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, sale of Stock, consideration received per transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net loss</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Aggregate Intrinsic Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantsAndRightsOutstandingTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants and Rights Outstanding, Term</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedDividendRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDivestitureOfBusinesses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Divestiture of Businesses</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonclassdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Class D [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risk-free rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsRiskFreeInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid expenses and other current assets</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase (Decrease) in Prepaid Expense and Other Assets, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses and other current assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CollaborationAndLicenseRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaboration and license revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CollaborationAndLicenseRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Collaboration and license revenue [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investing activities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unit [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_UnitMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringCostAndReserveLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost and Reserve [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to additional paid in capital reclassification of early exercised stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustment to additional paid in capital reclassification of early exercised stock options.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of early exercised stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Vesting of early exercised stock options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_BusinessAcquisitionRemainingCostOfAcquiredEntityRecordedAsAReductionOfAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reduction Of Additional Paid In Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_BusinessAcquisitionRemainingCostOfAcquiredEntityRecordedAsAReductionOfAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Business Acquisition Remaining Cost Of Acquired Entity Recorded as a Reduction of Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_BusinessAcquisitionRemainingCostOfAcquiredEntityRecordedAsAReductionOfAdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Acquisition Remaining Cost Of Acquired Entity Recorded as a Reduction of Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revision of Prior Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Unrealized Loss On Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfUnrealizedLossOnInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Unrealized Loss on Investments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Other Assets [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfOtherAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Other Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromStockOptionsExercised_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Stock Options Exercised</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Year One</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognized_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Revenues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInInvestingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Investing Activity, Including Discontinued Operation</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsForfeituresInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Grant Date Fair Value RSUs, Forfeited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sublease Agreement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sublease Agreement [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SubleaseAgreementMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sublease Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Money Market Funds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MoneyMarketFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Money Market Funds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Temporary equity shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TemporaryEquitySharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Temporary Equity, Shares Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class Of Warrant Or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfWarrantOrRightLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Warrant or Right [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid, Remainder of Fiscal Year</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining nine months ending December 31, 2026</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty One PIPE Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty One PIPE Warrants Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOnePipeWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 PIPE Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestructuringPlanDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Plan [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legal Entity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LegalEntityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legal Entity [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Changes in operating assets and liabilities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOperatingCapitalAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Weighted Average Exercise Price Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Exercise Price Outstanding, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued professional service fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedProfessionalFeesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Professional Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponSettlementOfTrancheLiabilityInThe2025PIPEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock issuable upon settlement of tranche liability in the 2025 PIPE [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponSettlementOfTrancheLiabilityInThe2025PIPEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common stock issuable upon settlement of tranche liability in the 2025 PIPE [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockIssuableUponSettlementOfTrancheLiabilityInThe2025PIPEMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common stock issuable upon settlement of tranche liability in the 2025 PIPE [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrants, Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class Of Warrants, Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid-in Capital [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapitalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Additional Paid-in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Measurement Frequency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementFrequencyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Frequency [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountsReceivableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts Receivable Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountsReceivableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Receivable Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountsReceivableRelatedParty_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounts Receivable Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromCashAcquiredThroughAcquisitionAndPrivateInvestmentInPublicEntityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from cash acquired through acquisition and PIPE offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromCashAcquiredThroughAcquisitionAndPrivateInvestmentInPublicEntityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds From Cash Acquired Through Acquisition And Private Investment In Public Entity Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromCashAcquiredThroughAcquisitionAndPrivateInvestmentInPublicEntityOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from cash acquired through acquisition and private investment in public entity offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantAsset1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Asset1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantAsset1_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant Asset1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantAsset1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStock1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock, Closing Price equals or Exceeds $18 Per Share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStock1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStock1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Stock, 1.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revision of Prior Period, Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">After Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RestatementAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">After Business Combination</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EmployeeSeveranceAndOtherBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Employee Severance and Other Benefits [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EmployeeSeveranceAndOtherBenefitsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Severance and Other Benefits [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClosingSalePriceBelow1200PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Closing Sale Price Below 12.00 per share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClosingSalePriceBelow1200PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Closing Sale Price Below 12.00 per share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing activities:</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected term (in years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardFairValueAssumptionsExpectedTerm1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsRecurringMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, to be Paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityPaymentsDue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total lease payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Issuance of Common Stock Upon Exercise of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Issuance of common stock upon exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_IssuanceOfCommonStockUponExerciseOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Exercise of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Less: Imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lessee, Operating Lease, Liability, Undiscounted Excess Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LesseeOperatingLeaseLiabilityUndiscountedExcessAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Less: Imputed interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PrepaidResearchAndDevelopmentExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid research and development expenses.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CashCashEquivalentsAndInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, cash equivalents and investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CashCashEquivalentsAndInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash, cash equivalents and investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CashCashEquivalentsAndInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Cash Equivalents And Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementEquityComponentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Components</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty Five Pre Funded Warrants [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Pre Funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyFivePreFundedWarrantsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2025 Pre-Funded Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DeferredFinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs included in accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DeferredFinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Deferred Financing costs Included in Accrued and other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_DeferredFinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Financing costs Included in Accrued and other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandFifteenStockPlan1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two thousand fifteen stock plan 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandFifteenStockPlan1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two thousand fifteen stock plan 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandFifteenStockPlan1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2015 stock plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Component</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityComponentDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Component [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Business Acquisition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BusinessAcquisitionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Business Combination [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemablePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Redeemable Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RedeemablePreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable Convertible Preferred Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing costs included in accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing costs included in accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_FinancingCostsIncludedInAccruedAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financing costs included in accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expiration period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Depreciation and amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Depreciation, Depletion and Amortization, Nonproduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DepreciationAndAmortization_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Depreciation, Depletion and Amortization, Nonproduction, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Liabilities, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statistical Measurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Exercise Price Exercised</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common stock issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Common Stock, Value, Issued, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Value, Issued, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Stock, Value, Issued, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock, $0.0001 par value, 500,000 shares authorized as of March 31,2025 and December 31, 2024; 8,495 and 3,262 shares issued and outstanding as of March 31, 2025 and December 31, 2024, respectively</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantRedemptionConditionMinimumSharePriceScenarioTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant Redemption Condition Minimum Share Price Scenario Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantRedemptionConditionMinimumSharePriceScenarioTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Redemption Condition Minimum Share Price Scenario Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantRedemptionConditionMinimumSharePriceScenarioTwo_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">WarrantRedemptionConditionMinimumSharePriceScenarioTwo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre Funded Warrants Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre-Funded Warrants Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PreFundedWarrantsPurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pre-Funded Warrants Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityFinancingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Financing shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityFinancingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Financing shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityFinancingShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Financing Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrant Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant Exercise Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantExercisePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrant exercise price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accrued and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightClassification_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock Warrant Classification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightClassification_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class Of Warrant Or Right Classification</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClassOfWarrantOrRightClassification_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class of Warrant or Right Classification.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accounting policies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccountingPoliciesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromIssuanceOfCommonStockUnderTheATMProgramNetOfTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock Under the ATM Program Net of Transaction Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromIssuanceOfCommonStockUnderTheATMProgramNetOfTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Proceeds from Issuance of Common Stock Under the ATM Program Net of Transaction Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ProceedsFromIssuanceOfCommonStockUnderTheATMProgramNetOfTransactionCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of common stock under the ATM program, net of issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClosingSalePriceBelow1000PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Closing Sale Price Below 10.00 per share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ClosingSalePriceBelow1000PerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Closing Sale Price Below 10.00 per share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardFairValueAssumptionsExpectedVolatilityRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred stock, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockSharesAuthorized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Shares Authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReconciliationOfCashCashEquivalentsAndRestrictedCashToConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconciliation Of Cash Cash Equivalents And Restricted Cash To Consolidated Balance Sheets Abstract</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReconciliationOfCashCashEquivalentsAndRestrictedCashToConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reconciliation Of Cash Cash Equivalents And Restricted Cash To Consolidated Balance Sheets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ReconciliationOfCashCashEquivalentsAndRestrictedCashToConsolidatedBalanceSheetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reconciliation of cash,cash equivalents and restricted cash to consolidated balance sheets abstract.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Employee Stock Purchase Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Options</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EighteenMonthsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eighteen Months [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EighteenMonthsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eighteen months.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from issuance of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating expenses:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedResearchAndDevelopmentExpensesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued research and development expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedResearchAndDevelopmentExpensesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Research And Development Expenses Current And Noncurrent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AccruedResearchAndDevelopmentExpensesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accrued research and development expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Share Based Compensation Arrangement By Share Based Payment Award [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurement Inputs and Valuation Techniques</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk, Credit Risk, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskCreditRisk_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration of Credit Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation Items [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ConsolidationItemsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidation Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TriggerFunding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trigger Funding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TriggerFunding_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Trigger funding.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TriggerFunding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trigger funding amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash payments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRestructuring_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Restructuring</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of property and equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments to Acquire Property, Plant, and Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments to Acquire Property, Plant, and Equipment, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares RSUs, Grants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PrivateInvestmentInPublicEntityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Private Investment In Public Entity Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PrivateInvestmentInPublicEntityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Private Investment In Public Entity Offering [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PrivateInvestmentInPublicEntityOfferingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Private investment in public entity offering member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRestructuringAndRelatedCostsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restructuring Cost [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted Average Remaining Contractual Life, Exercisable (In Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Option, Exercise Price Range, Exercisable, Weighted Average Remaining Contractual Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharebasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeExercisableOptionsWeightedAverageRemainingContractualTerm2_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Weighted Average Remaining Contractual Life (In Years)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Income Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Deferred Income Tax Expense (Benefit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredIncomeTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred income tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsIssuedCancelledAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cancellation of warrants issued and sold to management</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsIssuedCancelledAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrants Issued Cancelled And Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_WarrantsIssuedCancelledAndSold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Warrants Issued Cancelled And Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Number of Shares Issued in Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Number shares sold and issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockNumberOfSharesIssuedInTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number shares sold and issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Stock issued during period shares new shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Issuance of common stock in the 2025 PIPE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares Issue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Issue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SharesIssue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Shares Issue</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PercentageOfIncreaseInBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of Increase In Base Rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PercentageOfIncreaseInBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Increase In Base Rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PercentageOfIncreaseInBaseRent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of increase in base rent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Number of Shares RSAs, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedInPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares RSUs, Vested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ResearchServiceRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Research service revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ResearchServiceRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Research service revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ResearchServiceRevenueMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Research Service Revenue [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedStockAwardRSAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Stock Award R S A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedStockAwardRSAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Restricted Stock Award R S A.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedStockAwardRSAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unvested restricted stock awards [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RestrictedStockAwardRSAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RSA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net loss per share attributable to common stockholders, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net income (loss) per share available to (attributable to) common stockholders, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Segment Reporting Information, by Segment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfSegmentReportingInformationBySegmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule Of Segment Reporting Information BySegment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingSegmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Segments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionAccountingPolicyGrossAndNetRevenueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Recognition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionAccountingPolicyGrossAndNetRevenueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue Recognition Accounting Policy, Gross and Net Revenue Disclosure [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LincolnParkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lincoln Park [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LincolnParkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lincoln Park [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LincolnParkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lincoln Park [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Title and Position [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConversionBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock, Conversion Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockConversionBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Redeemable convertible preferred stock converted into common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RemainingUpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Remaining Upfront Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RemainingUpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Remaining Upfront Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RemainingUpfrontPayment_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Remaining Upfront Payment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in fair value upon remeasurement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueNetDerivativeAssetLiabilityMeasuredOnRecurringBasisUnobservableInputsReconciliationPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Increase in fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherComprehensiveIncomeLossNetOfTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Comprehensive Income (Loss), Net of Tax</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">License Agreements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LicenseAgreementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">License Agreements Abstract.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash, cash equivalents and restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent, Current</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfvestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Adjustment To Additional Paid In Capital Reclassification OfVesting of Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfvestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment To Additional Paid In Capital Reclassification OfVesting of Restricted Stock Units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfvestingOfRestrictedStockUnits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vesting of restricted stock units</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sale of Stock, Description of Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SaleOfStockDescriptionOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of common stock closing sale transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Segment Reporting Information [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteStockSplitConversionRatio1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity Note, Stock Split, Conversion Ratio</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investor [Member]</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnAmendmentAndCancellationOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loss on Amendment and Cancellation of Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnAmendmentAndCancellationOfWarrants_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Loss on amendment and cancellation of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_LossOnAmendmentAndCancellationOfWarrants_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Loss on amendment and cancellation of warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardDateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOneStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Two Thousand Twenty One Equity Incentive Stock Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOneStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty One Equity Incentive Plan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_TwoThousandTwentyOneStockPlanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">2021 Stock Plan</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesBCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series B Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesBCommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series B Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Property and equipment, net</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Property, Plant and Equipment, Net, Total</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PropertyPlantAndEquipmentNet_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Property, Plant and Equipment, Net, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentalIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rental Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentalIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rental income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RentalIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rental Income</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net operating loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated Deficit</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_RecapitalizationNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure for recapitalization.</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PercentageOfDiscountPayrollDeductions_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of discount payroll deductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PercentageOfDiscountPayrollDeductions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of discount payroll deductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payments for milestone agreement on achievement of milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments For Milestone Agreement On Achievement Of Milestones</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_PaymentsForMilestoneAgreementOnAchievementOfMilestones_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payments for milestone agreement on achievement of milestones.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Employee Benefits and Share-Based Compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EmployeeBenefitsAndShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total stock-based compensation expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class C [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Payment Arrangement, Noncash Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Share-based Payment Arrangement, Noncash Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShareBasedCompensation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Stock-based compensation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expected Volatility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputPriceVolatilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Price Volatility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of deferred transaction costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock purchase commitment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average grant date fair value, cancelled</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Cancelled in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Cancelled in Period, Weighted Average Grant Date Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OperatingLeaseLiabilityNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lease liabilities, noncurrent portion</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net cash provided by financing activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockTradingDiscription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock Trading Discription</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockTradingDiscription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Common Stock Trading Discription</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_CommonStockTradingDiscription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common stock trading description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AprilTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">April Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AprilTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">April Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_AprilTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 2026</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Stockholders' Equity Note, Warrants or Rights [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockholdersEquityNoteWarrantsOrRightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Common Stock Warrants Outstanding</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityMethodInvestmentDescriptionOfOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Method Investment, Description of Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_EquityMethodInvestmentDescriptionOfOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of ownership percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Anti-dilutive Securities Excluded from Computation of Earnings Per Share</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_ShortTermMarketableSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Marketable Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
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          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series E Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series E Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srzn_SeriesECommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series E common stock</link:label>
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  <xsd:element id="srzn_ChangeInFairValueOfTrancheLiability" name="ChangeInFairValueOfTrancheLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_CommonStockIssuableUponSettlementOfTrancheLiabilityInThe2025PIPEMember" name="CommonStockIssuableUponSettlementOfTrancheLiabilityInThe2025PIPEMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SublicensingFees" name="SublicensingFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_DistributedBioSubscriptionAgreementMember" name="DistributedBioSubscriptionAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AccruedFinancingCosts" name="AccruedFinancingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_ClassOfWarrantsPurchasePrice" name="ClassOfWarrantsPurchasePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_GrossSalesCommissionsPrice" name="GrossSalesCommissionsPrice" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_InterestAndOtherReceivables" name="InterestAndOtherReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_AccountsReceivableRelatedParty" name="AccountsReceivableRelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_RepurchaseOfEarlyExercisedStockOptionsShares" name="RepurchaseOfEarlyExercisedStockOptionsShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_DevelopmentAndManufacturingCosts" name="DevelopmentAndManufacturingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_IssuanceOfCommonStockUnderEquityPurchaseAgreement" name="IssuanceOfCommonStockUnderEquityPurchaseAgreement" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ClassOfWarrantsPurchased" name="ClassOfWarrantsPurchased" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_CommonStockTradingDiscription" name="CommonStockTradingDiscription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_StanfordLicenseAgreementsMember" name="StanfordLicenseAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_LincolnParkMember" name="LincolnParkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_EmergingGrowthCompanyStatusPolicyTextBlock" name="EmergingGrowthCompanyStatusPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_CompensationPayable" name="CompensationPayable" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TwoThousandTwentyFourPreFundedWarrantsMember" name="TwoThousandTwentyFourPreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_NuraBioMember" name="NuraBioMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ProceedsFromCashAcquiredThroughAcquisitionAndPrivateInvestmentInPublicEntityOffering" name="ProceedsFromCashAcquiredThroughAcquisitionAndPrivateInvestmentInPublicEntityOffering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_AccountingPoliciesTable" name="AccountingPoliciesTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_RestrictedNonCurrentCash" name="RestrictedNonCurrentCash" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SuccessBasedMilestonePayments" name="SuccessBasedMilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_NoncashConsiderationReceivedInConnectionWithResearchServiceRevenue" name="NoncashConsiderationReceivedInConnectionWithResearchServiceRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TriggerFunding" name="TriggerFunding" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_SeriesACommonStockWarrantsMember" name="SeriesACommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_GainLossUponExecution" name="GainLossUponExecution" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_RestructuringPersonnelAdjustment" name="RestructuringPersonnelAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_LicenseAgreementsDisclosureTextBlock" name="LicenseAgreementsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TwoThousandTwentyFourPipeWarrantsSeriesBMember" name="TwoThousandTwentyFourPipeWarrantsSeriesBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoThousandTwentyFourPipeWarrantsSeriesDMember" name="TwoThousandTwentyFourPipeWarrantsSeriesDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_WarrantExercisePrice" name="WarrantExercisePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ExternalServices" name="ExternalServices" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_LossOnAmendmentAndCancellationOfWarrants" name="LossOnAmendmentAndCancellationOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_RedeemableWarrantMember" name="RedeemableWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_GeneralAndAdministrativeMember" name="GeneralAndAdministrativeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoYearsMember" name="TwoYearsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_LicenseAgreementsLineItems" name="LicenseAgreementsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_WarrantLiability" name="WarrantLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_EquityWarrantAssetsExercisable" name="EquityWarrantAssetsExercisable" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TwoThousandTwentyFiveStockPlanMember" name="TwoThousandTwentyFiveStockPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_GainOnSettlementOfTrancheLiability" name="GainOnSettlementOfTrancheLiability" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_CommonStockWarrantsDisclosureTextBlock" name="CommonStockWarrantsDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_PurchasePricePerShareOfAdditionalShares" name="PurchasePricePerShareOfAdditionalShares" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_RepurchaseOfEarlyExcercisedStockOptions" name="RepurchaseOfEarlyExcercisedStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TwoThousandFifteenStockPlan1Member" name="TwoThousandFifteenStockPlan1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ExtendedSubleaseTermDescription" name="ExtendedSubleaseTermDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_IssuanceOfCommonStockUponWarrantExerciseShare" name="IssuanceOfCommonStockUponWarrantExerciseShare" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TrancheLiabilityFairValue" name="TrancheLiabilityFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SubleaseTerm" name="SubleaseTerm" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_FairValueOfTheWarrantAtInception" name="FairValueOfTheWarrantAtInception" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_GainDueTheCancellationOfWarrant" name="GainDueTheCancellationOfWarrant" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TwoThousandTwentyFivePIPEWarrantsMember" name="TwoThousandTwentyFivePIPEWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_PurchaseOfAdditionalShares" name="PurchaseOfAdditionalShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_UnauditedCondensedConsolidatedFinancialStatementsPolicyTextBlock" name="UnauditedCondensedConsolidatedFinancialStatementsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_CommonStockConversionBasis1" name="CommonStockConversionBasis1" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_WarrantNoticePeriodPriorToRedemptionDate" name="WarrantNoticePeriodPriorToRedemptionDate" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ClosingSalePriceBelow1000PerShareMember" name="ClosingSalePriceBelow1000PerShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SecuritiesPurchaseAgreementMember" name="SecuritiesPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ProceedsFromIssuanceOfCommonStockUnderTheATMProgramNetOfTransactionCosts" name="ProceedsFromIssuanceOfCommonStockUnderTheATMProgramNetOfTransactionCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_RestructuringEndiningBalance" name="RestructuringEndiningBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_UnitMember" name="UnitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_RentAndFacilityExpenses" name="RentAndFacilityExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_IssuanceOfCommonStockUponWarrantExercise" name="IssuanceOfCommonStockUponWarrantExercise" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_EighteenMonthsMember" name="EighteenMonthsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_MembersOfManagementMember" name="MembersOfManagementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoThousandTwentyOnePublicWarrantsMember" name="TwoThousandTwentyOnePublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_WarrantLiabilitiesPolicyTextBlock" name="WarrantLiabilitiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriodWeightedAverageGrantDateFairValue" type="xbrli:decimalItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEOneMember" name="TwoThousandTwentyFivePipeWarrantsSeriesEOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SeriesACommonStockMember" name="SeriesACommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_CollaborationAndLicenseAgreementsTextBlock" name="CollaborationAndLicenseAgreementsTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_SeriesDCommonStocksMember" name="SeriesDCommonStocksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreement" name="IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_LossOnExecutionOfAPrivatePlacement" name="LossOnExecutionOfAPrivatePlacement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_LicenseAgreementsTable" name="LicenseAgreementsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ClosingSalePriceBelow1200PerShareMember" name="ClosingSalePriceBelow1200PerShareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsCancelledInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_WarrantsToPurchaseCommonStock1" name="WarrantsToPurchaseCommonStock1" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_EquityFinancingShares" name="EquityFinancingShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ReconciliationOfCashCashEquivalentsAndRestrictedCashToConsolidatedBalanceSheetsAbstract" name="ReconciliationOfCashCashEquivalentsAndRestrictedCashToConsolidatedBalanceSheetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_NumberOfWarrantsVested" name="NumberOfWarrantsVested" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_RecapitalizationNoteDisclosureTextBlock" name="RecapitalizationNoteDisclosureTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_MilestonePaymentReceived" name="MilestonePaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TransactionCostsAllocatedToIssuedSharesOfCommonStockIncludedInAccruedAndOtherLiabilities" name="TransactionCostsAllocatedToIssuedSharesOfCommonStockIncludedInAccruedAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SeriesBCommonStockWarrantMember" name="SeriesBCommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TrancheLiabilityMember" name="TrancheLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreementShares" name="IssuanceOfCommonStockAsACommitmentFeeUnderEquityPurchaseAgreementShares" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TwoThousandTwentyOnePipeWarrantsMember" name="TwoThousandTwentyOnePipeWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfvestingOfRestrictedStockUnits" name="AdjustmentToAdditionalPaidInCapitalReclassificationOfvestingOfRestrictedStockUnits" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_DerivativeLiabilityMember" name="DerivativeLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_PaymentsForMilestoneAgreementOnAchievementOfMilestones" name="PaymentsForMilestoneAgreementOnAchievementOfMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_Issuanceofcommonstockvalueunderequitypurchaseagreement" name="Issuanceofcommonstockvalueunderequitypurchaseagreement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_SeriesBCommonStockMember" name="SeriesBCommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoThousandTwentyFourPipeWarrantsSeriesCMember" name="TwoThousandTwentyFourPipeWarrantsSeriesCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_OtherIncomeLossOnIssuanceOfCommonStock" name="OtherIncomeLossOnIssuanceOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PurchasePricePerShareAccompanyingCommonStockWarrants" name="PurchasePricePerShareAccompanyingCommonStockWarrants" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_CommonclassdMember" name="CommonclassdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_RentalIncome" name="RentalIncome" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TwoThousandTwentyFourPipeWarrantsMember" name="TwoThousandTwentyFourPipeWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SeriesECommonStockWarrantMember" name="SeriesECommonStockWarrantMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TransactionPrice" name="TransactionPrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_TwoThousandTwentyOneStockPlanMember" name="TwoThousandTwentyOneStockPlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights" name="ClassOfWarrantOrRightRedemptionPriceOfWarrantsOrRights" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_RevenueRecognitionsPolicyTextBlock" name="RevenueRecognitionsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_TcgfbIncMember" name="TcgfbIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_WarrantLiabilityMember" name="WarrantLiabilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AccountingPoliciesLineItems" name="AccountingPoliciesLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_MilestonePayments" name="MilestonePayments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SalesAgreementTerminatedMember" name="SalesAgreementTerminatedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TrancheLiabilityPolicyTextBlock" name="TrancheLiabilityPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_ReductionInWorkforce" name="ReductionInWorkforce" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_CommonStock1Member" name="CommonStock1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SeriesCCommonStockMember" name="SeriesCCommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AprilTwoThousandTwentySixMember" name="AprilTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_CollaborationAndLicenseRevenueMember" name="CollaborationAndLicenseRevenueMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_UpfrontPayment" name="UpfrontPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_SeriesDCommonStockMember" name="SeriesDCommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_PaymentsForMilestoneAgreementOrEarnedRoyaltiesOnAchievementOfMilestones" name="PaymentsForMilestoneAgreementOrEarnedRoyaltiesOnAchievementOfMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PrivateInvestmentInPublicEntityOfferingMember" name="PrivateInvestmentInPublicEntityOfferingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_RestructuringBeginingBalance" name="RestructuringBeginingBalance" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_AccountsReceivable-RelatedParty" name="AccountsReceivable-RelatedParty" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_TwoThousandTwentyFivePipeWarrantsSeriesEMember" name="TwoThousandTwentyFivePipeWarrantsSeriesEMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SeriesCCommonStocksMember" name="SeriesCCommonStocksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_EquityMethodInvestmentDescriptionOfOwnershipPercentage" name="EquityMethodInvestmentDescriptionOfOwnershipPercentage" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_RestrictedStockAwardRSAMember" name="RestrictedStockAwardRSAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_CashCashEquivalentsAndInvestments" name="CashCashEquivalentsAndInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PercentageOfDiscountPayrollDeductions" name="PercentageOfDiscountPayrollDeductions" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_AssociatedWithholdingTax" name="AssociatedWithholdingTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_ClassOfWarrantOrRightPeriodForWhichWarrantsOrRightsExercisable" name="ClassOfWarrantOrRightPeriodForWhichWarrantsOrRightsExercisable" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_WarrantToPurchaseCommonStockMember" name="WarrantToPurchaseCommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_GrossProceedsFromIssuanceOfCommonStock" name="GrossProceedsFromIssuanceOfCommonStock" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PIPEWarrantsMember" name="PIPEWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_DocumentDocumentAndEntityInformationAbstract" name="DocumentDocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ProceedsFromSaleOfShares" name="ProceedsFromSaleOfShares" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_BusinessAcquisitionRemainingCostOfAcquiredEntityRecordedAsAReductionOfAdditionalPaidInCapital" name="BusinessAcquisitionRemainingCostOfAcquiredEntityRecordedAsAReductionOfAdditionalPaidInCapital" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PrepaidResearchAndDevelopmentExpenses" name="PrepaidResearchAndDevelopmentExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_WarrantRedemptionConditionMinimumSharePriceScenarioTwo" name="WarrantRedemptionConditionMinimumSharePriceScenarioTwo" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_EmployeeStockPurchasePlanMember" name="EmployeeStockPurchasePlanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_UpfrontPaymentNetOfContractCosts" name="UpfrontPaymentNetOfContractCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_InvestorsMember" name="InvestorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_WarrantAsset1" name="WarrantAsset1" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_ClassOfWarrantOrRightClassification" name="ClassOfWarrantOrRightClassification" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_RelatedPartyServiceRevenue" name="RelatedPartyServiceRevenue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_ATMProgramMember" name="ATMProgramMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_IssuanceOfCommonStockUponExerciseOfWarrants" name="IssuanceOfCommonStockUponExerciseOfWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_GuggenheimSecuritiesLlcMember" name="GuggenheimSecuritiesLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions" name="AdjustmentToAdditionalPaidInCapitalReclassificationOfEarlyExercisedStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_PercentageOfIncreaseInBaseRent" name="PercentageOfIncreaseInBaseRent" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="srzn_LossOnIssuanceOfCommonStockPreFundedWarrantsAndWarrants" name="LossOnIssuanceOfCommonStockPreFundedWarrantsAndWarrants" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_DeferredFinancingCostsIncludedInAccruedAndOtherLiabilities" name="DeferredFinancingCostsIncludedInAccruedAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_LicenseAgreementsAbstract" name="LicenseAgreementsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SubleaseAgreementMember" name="SubleaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_NonRefundableUpfrontPaymentReceived" name="NonRefundableUpfrontPaymentReceived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_VestingOfEarlyExercisesOfStockOptions" name="VestingOfEarlyExercisesOfStockOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SeriesCRedeemableConvertiblePreferredStockMember" name="SeriesCRedeemableConvertiblePreferredStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_StanfordMember" name="StanfordMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoThousandTwentyFivePreFundedWarrantsMember" name="TwoThousandTwentyFivePreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_CollaborationAndLicenseAgreementWithBiMember" name="CollaborationAndLicenseAgreementWithBiMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_ShortTermMarketableSecuritiesMember" name="ShortTermMarketableSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_AccruedResearchAndDevelopmentExpensesCurrentAndNoncurrent" name="AccruedResearchAndDevelopmentExpensesCurrentAndNoncurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_WarrantsIssuedCancelledAndSold" name="WarrantsIssuedCancelledAndSold" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_CommonStockIssuableUponExerciseOfWarrantsMember" name="CommonStockIssuableUponExerciseOfWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_RecapitalizationNoteAbstract" name="RecapitalizationNoteAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SharesIssue" name="SharesIssue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_EightYearsMember" name="EightYearsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_EmployeeSeveranceAndOtherBenefitsMember" name="EmployeeSeveranceAndOtherBenefitsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_SeriesECommonStockWarrantsMember" name="SeriesECommonStockWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwentyFourMonthsMember" name="TwentyFourMonthsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_UnvestedCommonStockSharesSubjectToRepurchaseMember" name="UnvestedCommonStockSharesSubjectToRepurchaseMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_PaymentsForAchievementOfSpecifiedDevelopmentAndRegulatoryMilestones" name="PaymentsForAchievementOfSpecifiedDevelopmentAndRegulatoryMilestones" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="srzn_SeriesECommonStockMember" name="SeriesECommonStockMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_FinancingCostsIncludedInAccruedAndOtherLiabilities" name="FinancingCostsIncludedInAccruedAndOtherLiabilities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="srzn_PreFundedWarrantsMember" name="PreFundedWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_PreFundedWarrantsPurchasePrice" name="PreFundedWarrantsPurchasePrice" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="srzn_PublicWarrantsMember" name="PublicWarrantsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="srzn_TwoTranchePrivatePlacementMember" name="TwoTranchePrivatePlacementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
