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  <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="ScholtenSurgicalInstrumentsIncMember" id="mmsi_ScholtenSurgicalInstrumentsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="ContingentConsiderationPaymentThreeMember" id="mmsi_ContingentConsiderationPaymentThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="NeilPetersonMember" id="mmsi_NeilPetersonMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="RaulParraMember" id="mmsi_RaulParraMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="CrannmedLimitedMember" id="mmsi_CrannmedLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="DeferredPaymentsAcquisitionOfEquityMethodInvestments" id="mmsi_DeferredPaymentsAcquisitionOfEquityMethodInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" abstract="false" xbrli:balance="credit" />
  <xsd:element name="EGSPurchaseAgreementMember" id="mmsi_EGSPurchaseAgreementMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityMethodInvestmentAdditionalPreferenceSharesMember" id="mmsi_EquityMethodInvestmentAdditionalPreferenceSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="EquityMethodInvestmentAdditionalFundingMember" id="mmsi_EquityMethodInvestmentAdditionalFundingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
  <xsd:element name="MeritMedicalIrelandLimitedMember" id="mmsi_MeritMedicalIrelandLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" abstract="true" />
</xsd:schema>
