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  <xsd:element name="BiotraceMedicalIncMember" id="mmsi_BiotraceMedicalIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AssetAcquisitionContingentConsiderationNumberOfAnnualPayments" id="mmsi_AssetAcquisitionContingentConsiderationNumberOfAnnualPayments" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="AssetAcquisitionContingentConsiderationPercentOfNetSalesRevenue" id="mmsi_AssetAcquisitionContingentConsiderationPercentOfNetSalesRevenue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="IncomeTaxExpenseBenefitRestructuringOfForeignEntities" id="mmsi_IncomeTaxExpenseBenefitRestructuringOfForeignEntities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="XableCathMember" id="mmsi_XableCathMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MeritShareholderDerivativeSuitMember" id="mmsi_MeritShareholderDerivativeSuitMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredTaxAssetsCapitalizedResearchAndDevelopmentExpense" id="mmsi_DeferredTaxAssetsCapitalizedResearchAndDevelopmentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="debit" />
  <xsd:element name="SoloPaceIncMember" id="mmsi_SoloPaceIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="LondonInterbankOfferedRateSwapRateMember" id="mmsi_LondonInterbankOfferedRateSwapRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityMethodInvestmentSharesOwned" id="mmsi_EquityMethodInvestmentSharesOwned" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" />
  <xsd:element name="AdvancedRadiationTherapyLlcMember" id="mmsi_AdvancedRadiationTherapyLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AngioDynamicsIncMember" id="mmsi_AngioDynamicsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="AssetAcquisitionInProcessResearchAndDevelopmentExpense" id="mmsi_AssetAcquisitionInProcessResearchAndDevelopmentExpense" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="BusinessAcquisitionPurchaseCommitmentPeriod" id="mmsi_BusinessAcquisitionPurchaseCommitmentPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="BusinessAcquisitionRevenueThreshold" id="mmsi_BusinessAcquisitionRevenueThreshold" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="FAnnMillnerMember" id="mmsi_FAnnMillnerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="SeniorUnsecuredConvertibleNotesMember" id="mmsi_SeniorUnsecuredConvertibleNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DebtInstrumentRepurchasePercentage" id="mmsi_DebtInstrumentRepurchasePercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="DebtInstrumentConversionRatioMultipleOfPrincipal" id="mmsi_DebtInstrumentConversionRatioMultipleOfPrincipal" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="DebtInstrumentCappedCallTransactionCost" id="mmsi_DebtInstrumentCappedCallTransactionCost" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="debit" />
  <xsd:element name="EquityAdjustmentsPurchaseOfCappedCallOptions" id="mmsi_EquityAdjustmentsPurchaseOfCappedCallOptions" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LesseeOperatingLeaseLeaseNotYetCommencedAverageAnnualMaturities" id="mmsi_LesseeOperatingLeaseLeaseNotYetCommencedAverageAnnualMaturities" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="LineOfCreditFacilityCovenantTermsConsolidatedTotalNetLeverageRatioMaximum" id="mmsi_LineOfCreditFacilityCovenantTermsConsolidatedTotalNetLeverageRatioMaximum" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LineOfCreditFacilityCovenantTermsConsolidatesSeniorSecuredNetLeverageRatio" id="mmsi_LineOfCreditFacilityCovenantTermsConsolidatesSeniorSecuredNetLeverageRatio" type="xbrli:pureItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionOneForConversionNumberOfDaysAfterAnyTenDaysTradingPricePerShareIsLessThan98OfProductLastReportedSalePriceOfCommonStock" id="mmsi_ConditionOneForConversionNumberOfDaysAfterAnyTenDaysTradingPricePerShareIsLessThan98OfProductLastReportedSalePriceOfCommonStock" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionOneForConversionNumberOfConsecutiveTradingDaysToBeCheckedForTradingPrice" id="mmsi_ConditionOneForConversionNumberOfConsecutiveTradingDaysToBeCheckedForTradingPrice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="MinimumPercentageOfLastReportedSalePriceOfCommonStockShouldBeForConversionAsConditionOne" id="mmsi_MinimumPercentageOfLastReportedSalePriceOfCommonStockShouldBeForConversionAsConditionOne" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionTwoForConversionDurationInWhichCompanyIssuesStockAtPriceLessThanAverageClosingSalePrice" id="mmsi_ConditionTwoForConversionDurationInWhichCompanyIssuesStockAtPriceLessThanAverageClosingSalePrice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionTwoForConversionNumberOfConsecutiveTradingDaysToBeCheckedForSharesIssuePriceLessThanAverageClosingRice" id="mmsi_ConditionTwoForConversionNumberOfConsecutiveTradingDaysToBeCheckedForSharesIssuePriceLessThanAverageClosingRice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionTwoForConversionMinimumPercentageOfPreviousDaySClosingSalePriceToBeForCompanySElectionToDistributeToShareholders" id="mmsi_ConditionTwoForConversionMinimumPercentageOfPreviousDaySClosingSalePriceToBeForCompanySElectionToDistributeToShareholders" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionFourForConversionPercentageOfLastReportedSalePriceExceedingConversionPrice" id="mmsi_ConditionFourForConversionPercentageOfLastReportedSalePriceExceedingConversionPrice" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionFourForConversionThresholdNumberOfDaysLastReportedSalesPriceExceedingPercentageOfConversionPrice" id="mmsi_ConditionFourForConversionThresholdNumberOfDaysLastReportedSalesPriceExceedingPercentageOfConversionPrice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ConditionFourForConversionThresholdNumberOfConsecutiveDaysLastReportedSalesPriceExceedingPercentageOfConversionPrice" id="mmsi_ConditionFourForConversionThresholdNumberOfConsecutiveDaysLastReportedSalesPriceExceedingPercentageOfConversionPrice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="LastReportedSalesPriceOfStockAsPercentageOfConversionPriceForRedemptionOfDebt" id="mmsi_LastReportedSalesPriceOfStockAsPercentageOfConversionPriceForRedemptionOfDebt" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ThresholdNumberOfDaysLastReportedSalesPriceExceedingPercentageOfConversionPriceForRedemption" id="mmsi_ThresholdNumberOfDaysLastReportedSalesPriceExceedingPercentageOfConversionPriceForRedemption" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
  <xsd:element name="ThresholdNumberOfConsecutiveDaysLastReportedSalesPriceExceedingPercentageOfConversionPriceForRedemption" id="mmsi_ThresholdNumberOfConsecutiveDaysLastReportedSalesPriceExceedingPercentageOfConversionPriceForRedemption" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="false" />
</xsd:schema>
