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  <xsd:element name="StockSurrenderedDuringPeriodSharesStockOptionsExercised" id="mmsi_StockSurrenderedDuringPeriodSharesStockOptionsExercised" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BiolifeLLCMember" id="mmsi_BiolifeLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="PaymentsToAcquireBusinessesUpfrontPayment" id="mmsi_PaymentsToAcquireBusinessesUpfrontPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="PaymentsToAcquireBusinessesWorkingCapitalAdjustment" id="mmsi_PaymentsToAcquireBusinessesWorkingCapitalAdjustment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationRecognizedAssetAcquiredAndGoodwill" id="mmsi_BusinessCombinationRecognizedAssetAcquiredAndGoodwill" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesCurrent" id="mmsi_BusinessCombinationRecognizedLiabilityAssumedAccruedExpensesCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationRecognizedLiabilityAssumedLiabilitiesRelatedToUnrecognizedTaxBenefits" id="mmsi_BusinessCombinationRecognizedLiabilityAssumedLiabilitiesRelatedToUnrecognizedTaxBenefits" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="IncomeTaxRefundReceivables" id="mmsi_IncomeTaxRefundReceivables" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="C2CryoballoonDeviceAndRelatedTechnologyAcquisitionMember" id="mmsi_C2CryoballoonDeviceAndRelatedTechnologyAcquisitionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DualCapDisinfectionProtectionSystemMember" id="mmsi_DualCapDisinfectionProtectionSystemMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FoundationalMember" id="mmsi_FoundationalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticMember" id="mmsi_TherapeuticMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BusinessCombinationNumberOfDeferredPayments" id="mmsi_BusinessCombinationNumberOfDeferredPayments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessCombinationDeferredAnnualPayment" id="mmsi_BusinessCombinationDeferredAnnualPayment" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="ViewPointMedicalIncMember" id="mmsi_ViewPointMedicalIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationContingentConsideration" id="mmsi_DisposalGroupIncludingDiscontinuedOperationContingentConsideration" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="DisposalGroupIncludingDiscontinuedOperationContingentConsiderationHeldBackPeriod" id="mmsi_DisposalGroupIncludingDiscontinuedOperationContingentConsiderationHeldBackPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MaximumManufacturingTransitionAndDistributionServicesAgreementPeriod" id="mmsi_MaximumManufacturingTransitionAndDistributionServicesAgreementPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="PaymentForShareBasedCompensation" id="mmsi_PaymentForShareBasedCompensation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FoundationalAccessMember" id="mmsi_FoundationalAccessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FoundationalOriginalEquipmentManufacturerMember" id="mmsi_FoundationalOriginalEquipmentManufacturerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FoundationalProceduralSolutionsMember" id="mmsi_FoundationalProceduralSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="FoundationalVascularInterventionMember" id="mmsi_FoundationalVascularInterventionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticCardiacTherapiesMember" id="mmsi_TherapeuticCardiacTherapiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticEndoscopyMember" id="mmsi_TherapeuticEndoscopyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticOriginalEquipmentManufacturerMember" id="mmsi_TherapeuticOriginalEquipmentManufacturerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticOncologyMember" id="mmsi_TherapeuticOncologyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticRenalTherapiesMember" id="mmsi_TherapeuticRenalTherapiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="TherapeuticVascularInterventionMember" id="mmsi_TherapeuticVascularInterventionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="BrianLloydMember" id="mmsi_BrianLloydMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentAdditionalInterestRateRequired" id="mmsi_DebtInstrumentAdditionalInterestRateRequired" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="DebtInstrumentRestrictedLegendAdditionalInterestPaid" id="mmsi_DebtInstrumentRestrictedLegendAdditionalInterestPaid" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="BusinessCombinationDeferredAnnualPaymentFairValue" id="mmsi_BusinessCombinationDeferredAnnualPaymentFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
</xsd:schema>
