<?xml version="1.0" encoding="US-ASCII"?>
<!--XBRL Document Created with Wdesk from Workiva-->
<!-- -->
<link:linkbase xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
  <link:roleRef roleURI="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilities" xlink:href="icui-20191231.xsd#AccruedLiabilitiesOtherLongTermLiabilities" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesDetails" xlink:href="icui-20191231.xsd#AccruedLiabilitiesOtherLongTermLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesOtherLongTermLiabilitiesDetails" xlink:href="icui-20191231.xsd#AccruedLiabilitiesOtherLongTermLiabilitiesOtherLongTermLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesTables" xlink:href="icui-20191231.xsd#AccruedLiabilitiesOtherLongTermLiabilitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsHospiraContingentConsiderationDetails" xlink:href="icui-20191231.xsd#AcquisitionsHospiraContingentConsiderationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsHospiraIntangibleDetails" xlink:href="icui-20191231.xsd#AcquisitionsHospiraIntangibleDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsHospiraTableDetails" xlink:href="icui-20191231.xsd#AcquisitionsHospiraTableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsHospiraTables" xlink:href="icui-20191231.xsd#AcquisitionsHospiraTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsHospiraTextDetails" xlink:href="icui-20191231.xsd#AcquisitionsHospiraTextDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsNotes" xlink:href="icui-20191231.xsd#AcquisitionsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsProFormaDetails" xlink:href="icui-20191231.xsd#AcquisitionsProFormaDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularIntangibleDetails" xlink:href="icui-20191231.xsd#AcquisitionsPursuitVascularIntangibleDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularTableDetails" xlink:href="icui-20191231.xsd#AcquisitionsPursuitVascularTableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularTables" xlink:href="icui-20191231.xsd#AcquisitionsPursuitVascularTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularTextDetails" xlink:href="icui-20191231.xsd#AcquisitionsPursuitVascularTextDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/AcquisitionsTables" xlink:href="icui-20191231.xsd#AcquisitionsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CollaborativeAndOtherArrangementsDetails" xlink:href="icui-20191231.xsd#CollaborativeAndOtherArrangementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CollaborativeAndOtherArrangementsNotes" xlink:href="icui-20191231.xsd#CollaborativeAndOtherArrangementsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CollaborativeAndOtherArrangementsTables" xlink:href="icui-20191231.xsd#CollaborativeAndOtherArrangementsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CommitmentsAndContingencies" xlink:href="icui-20191231.xsd#CommitmentsAndContingencies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CommitmentsAndContingenciesContingenciesDetails" xlink:href="icui-20191231.xsd#CommitmentsAndContingenciesContingenciesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/CommitmentsAndContingenciesTables" xlink:href="icui-20191231.xsd#CommitmentsAndContingenciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ConsolidatedBalanceSheets" xlink:href="icui-20191231.xsd#ConsolidatedBalanceSheets" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ConsolidatedStatementsOfCashFlows" xlink:href="icui-20191231.xsd#ConsolidatedStatementsOfCashFlows" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ConsolidatedStatementsOfIncome" xlink:href="icui-20191231.xsd#ConsolidatedStatementsOfIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:href="icui-20191231.xsd#ConsolidatedStatementsOfStockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeBalanceSheetLocationDetails" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesDerivativeBalanceSheetLocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesAmountsAffectingConsolidatedStatementsOfIncomeDetails" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesAmountsAffectingConsolidatedStatementsOfIncomeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesCashFlowHedgeActivityIncludedInAccumulatedOtherComprehensiveIncomeLossDetails" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesCashFlowHedgeActivityIncludedInAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDetails" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesNotes" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DerivativesAndHedgingActivitiesTables" xlink:href="icui-20191231.xsd#DerivativesAndHedgingActivitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/DocumentAndEntityInformationDocument" xlink:href="icui-20191231.xsd#DocumentAndEntityInformationDocument" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementDetails" xlink:href="icui-20191231.xsd#FairValueMeasurementDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesHospiraQuantitativeInformationDetails" xlink:href="icui-20191231.xsd#FairValueMeasurementFairValueInputsLiabilitiesHospiraQuantitativeInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesPursuitQuantitativeInformationDetails" xlink:href="icui-20191231.xsd#FairValueMeasurementFairValueInputsLiabilitiesPursuitQuantitativeInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueMeasurementsRecurringBasisDetails" xlink:href="icui-20191231.xsd#FairValueMeasurementFairValueMeasurementsRecurringBasisDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementNotes" xlink:href="icui-20191231.xsd#FairValueMeasurementNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementTables" xlink:href="icui-20191231.xsd#FairValueMeasurementTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/FairValueMeasurementTextDetails" xlink:href="icui-20191231.xsd#FairValueMeasurementTextDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPolicies" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesAdvertisingExpensesDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesAdvertisingExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesBasisOfPresentationDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesBasisOfPresentationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesForeignCurrencyDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesForeignCurrencyDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesFutureEstimatedAmortizationExpenseDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesFutureEstimatedAmortizationExpenseDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets1Details" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets1Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets2Details" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets2Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesInventoryDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesInventoryDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesInvestmentsDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesInvestmentsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesNetIncomePerShareDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesNetIncomePerShareDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesNewAccountingPronouncementsDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesNewAccountingPronouncementsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPostRetirementAndPostEmploymentBenefitsDetails" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesPostRetirementAndPostEmploymentBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment1Details" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment1Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment2Details" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment2Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment3Details" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment3Details" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesTables" xlink:href="icui-20191231.xsd#GeneralAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationAndSignificantCustomersNotes" xlink:href="icui-20191231.xsd#GeographicInformationAndSignificantCustomersGeographicInformationAndSignificantCustomersNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationDetails" xlink:href="icui-20191231.xsd#GeographicInformationAndSignificantCustomersGeographicInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationTables" xlink:href="icui-20191231.xsd#GeographicInformationAndSignificantCustomersGeographicInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersLongLivedAssetsByGeographicLocationDetails" xlink:href="icui-20191231.xsd#GeographicInformationAndSignificantCustomersLongLivedAssetsByGeographicLocationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxes" xlink:href="icui-20191231.xsd#IncomeTaxes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesChangeInTaxesPayableDetails" xlink:href="icui-20191231.xsd#IncomeTaxesChangeInTaxesPayableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesDeferredIncomeTaxAssetsLiabilitiesDetails" xlink:href="icui-20191231.xsd#IncomeTaxesDeferredIncomeTaxAssetsLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesDeferredIncomeTaxProvisionDetails" xlink:href="icui-20191231.xsd#IncomeTaxesDeferredIncomeTaxProvisionDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesEffectiveTaxRateDetails" xlink:href="icui-20191231.xsd#IncomeTaxesEffectiveTaxRateDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesIncomeFromContinuingOperationsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesIncomeFromContinuingOperationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesIncomeTaxDisclosureTables" xlink:href="icui-20191231.xsd#IncomeTaxesIncomeTaxDisclosureTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesOperatingLossCarryforwardsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesOperatingLossCarryforwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:href="icui-20191231.xsd#IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesTaxBenefitFromExerciseOfStockOptionsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesTaxBenefitFromExerciseOfStockOptionsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesTaxCarryforwardsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesTaxCarryforwardsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesTaxHolidayDetails" xlink:href="icui-20191231.xsd#IncomeTaxesTaxHolidayDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesTaxReformDetails" xlink:href="icui-20191231.xsd#IncomeTaxesTaxReformDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesUndistributedForeignEarningsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesUndistributedForeignEarningsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:href="icui-20191231.xsd#IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesBalanceSheetLeaseAccountsTables" xlink:href="icui-20191231.xsd#LeasesBalanceSheetLeaseAccountsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesDetails" xlink:href="icui-20191231.xsd#LeasesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesLeaseCostDetails" xlink:href="icui-20191231.xsd#LeasesLeaseCostDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesLeaseCostTables" xlink:href="icui-20191231.xsd#LeasesLeaseCostTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesLeaseMaturitiesTables" xlink:href="icui-20191231.xsd#LeasesLeaseMaturitiesTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesLeaseMaturityDetails" xlink:href="icui-20191231.xsd#LeasesLeaseMaturityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesNotes" xlink:href="icui-20191231.xsd#LeasesNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesSupplementalBalanceSheetLeaseInformationDetails" xlink:href="icui-20191231.xsd#LeasesSupplementalBalanceSheetLeaseInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesSupplementalCashFlowLeaseInformationDetails" xlink:href="icui-20191231.xsd#LeasesSupplementalCashFlowLeaseInformationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LeasesSupplementalCashFlowLeaseInformationTables" xlink:href="icui-20191231.xsd#LeasesSupplementalCashFlowLeaseInformationTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LongTermObligationsDetails" xlink:href="icui-20191231.xsd#LongTermObligationsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LongTermObligationsLineOfCreditPricingDetails" xlink:href="icui-20191231.xsd#LongTermObligationsLineOfCreditPricingDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LongTermObligationsNotes" xlink:href="icui-20191231.xsd#LongTermObligationsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LongTermObligationsSeniorNoteDetails" xlink:href="icui-20191231.xsd#LongTermObligationsSeniorNoteDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/LongTermObligationsTables" xlink:href="icui-20191231.xsd#LongTermObligationsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsNotes" xlink:href="icui-20191231.xsd#PrepaidsAndOtherCurrentAssetsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:href="icui-20191231.xsd#PrepaidsAndOtherCurrentAssetsPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsRelatedPartyDetailsDetails" xlink:href="icui-20191231.xsd#PrepaidsAndOtherCurrentAssetsRelatedPartyDetailsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsTables" xlink:href="icui-20191231.xsd#PrepaidsAndOtherCurrentAssetsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationDetails1" xlink:href="icui-20191231.xsd#RestructuringStrategicTransactionAndIntegrationDetails1" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationDetails2" xlink:href="icui-20191231.xsd#RestructuringStrategicTransactionAndIntegrationDetails2" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationNotes" xlink:href="icui-20191231.xsd#RestructuringStrategicTransactionAndIntegrationNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationScheduleOfRestructuringAndRelatedCostsTables" xlink:href="icui-20191231.xsd#RestructuringStrategicTransactionAndIntegrationScheduleOfRestructuringAndRelatedCostsTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationStrategicTransactionAndIntegrationExpensesDetails" xlink:href="icui-20191231.xsd#RestructuringStrategicTransactionAndIntegrationStrategicTransactionAndIntegrationExpensesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueContractLiabilitiesDetails" xlink:href="icui-20191231.xsd#RevenueContractLiabilitiesDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueContractLiabilitiesTextDetails" xlink:href="icui-20191231.xsd#RevenueContractLiabilitiesTextDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueDetails" xlink:href="icui-20191231.xsd#RevenueDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueDisaggregationOfRevenueByGeographyDetails" xlink:href="icui-20191231.xsd#RevenueDisaggregationOfRevenueByGeographyDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueDisaggregationOfRevenueProductLineDetails" xlink:href="icui-20191231.xsd#RevenueDisaggregationOfRevenueProductLineDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueNotes" xlink:href="icui-20191231.xsd#RevenueNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/RevenueTables" xlink:href="icui-20191231.xsd#RevenueTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:href="icui-20191231.xsd#SelectedQuarterlyFinancialDataUnaudited" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:href="icui-20191231.xsd#SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:href="icui-20191231.xsd#SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardEsppNarrativeDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardEsppNarrativeDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardEsppTableDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardEsppTableDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardOptionsExercisedDataDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardOptionsExercisedDataDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardRestrictedStockUnitsDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardRestrictedStockUnitsDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardShareAwardDataDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardShareAwardDataDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardShareAwardsNotes" xlink:href="icui-20191231.xsd#ShareBasedAwardShareAwardsNotes" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardStockBasedCompensationDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardStockBasedCompensationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionActivityDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardStockOptionActivityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionPlansDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardStockOptionPlansDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionsGrantedAndValuationDetails" xlink:href="icui-20191231.xsd#ShareBasedAwardStockOptionsGrantedAndValuationDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/ShareBasedAwardTables" xlink:href="icui-20191231.xsd#ShareBasedAwardTables" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/StatementOfComprehensiveIncome" xlink:href="icui-20191231.xsd#StatementOfComprehensiveIncome" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/StockholdersEquity" xlink:href="icui-20191231.xsd#StockholdersEquity" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/StockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails" xlink:href="icui-20191231.xsd#StockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/StockholdersEquityDetails" xlink:href="icui-20191231.xsd#StockholdersEquityDetails" xlink:type="simple" />
  <link:roleRef roleURI="http://www.icumed.com/role/StockholdersEquityTables" xlink:href="icui-20191231.xsd#StockholdersEquityTables" xlink:type="simple" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilities" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesOtherLongTermLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AccruedLiabilitiesOtherLongTermLiabilitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsHospiraContingentConsiderationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsHospiraIntangibleDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsHospiraTableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsHospiraTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsHospiraTextDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsProFormaDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsPursuitVascularIntangibleDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsPursuitVascularTableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsPursuitVascularTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsPursuitVascularTextDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/AcquisitionsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CollaborativeAndOtherArrangementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CollaborativeAndOtherArrangementsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CollaborativeAndOtherArrangementsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CommitmentsAndContingencies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CommitmentsAndContingenciesContingenciesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/CommitmentsAndContingenciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ConsolidatedBalanceSheets" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsPayableCurrent" xlink:label="loc_us-gaap_AccountsPayableCurrent_9c889623-7b4f-c89a-bbb3-2bc9fb9ad9f5" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_AccountsPayableCurrent_9c889623-7b4f-c89a-bbb3-2bc9fb9ad9f5" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccruedLiabilitiesCurrent" xlink:label="loc_us-gaap_AccruedLiabilitiesCurrent_c90cf113-b51b-4312-22d0-4adb9883d309" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_AccruedLiabilitiesCurrent_c90cf113-b51b-4312-22d0-4adb9883d309" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsCurrent" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsCurrent_6c4a5ccc-9ebd-635d-8d7f-c7b5f1715cd0" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesCurrent_30dca50d-a7bd-cff0-949a-3d7ae869c50d" xlink:to="loc_us-gaap_LiabilityForUncertainTaxPositionsCurrent_6c4a5ccc-9ebd-635d-8d7f-c7b5f1715cd0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue" xlink:label="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_29c5d5af-f366-8313-437d-1202fc47cafc" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue_29c5d5af-f366-8313-437d-1202fc47cafc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent" xlink:label="loc_us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent_7b08ecc6-4569-4368-6472-43958c8fbd47" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_LiabilitiesOtherThanLongtermDebtNoncurrent_7b08ecc6-4569-4368-6472-43958c8fbd47" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilitiesNoncurrent" xlink:label="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_aec86b81-11aa-859e-2a56-c42f4bdc8086" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_DeferredTaxLiabilitiesNoncurrent_aec86b81-11aa-859e-2a56-c42f4bdc8086" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_LiabilityForUncertainTaxPositionsNoncurrent" xlink:label="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_5f6532e8-9e6d-0a09-4d87-b823fe099192" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_LiabilityForUncertainTaxPositionsNoncurrent_5f6532e8-9e6d-0a09-4d87-b823fe099192" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_LiabilitiesAndStockholdersEquity_d7f1ad03-6ed4-706a-15fc-eae794dee33a" xlink:to="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ConvertiblePreferredStockNonredeemableOrRedeemableIssuerOptionValue" xlink:label="loc_us-gaap_ConvertiblePreferredStockNonredeemableOrRedeemableIssuerOptionValue_b07445bf-4f8f-1562-6305-4efc9d9115ba" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_ConvertiblePreferredStockNonredeemableOrRedeemableIssuerOptionValue_b07445bf-4f8f-1562-6305-4efc9d9115ba" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CommonStockValue" xlink:label="loc_us-gaap_CommonStockValue_f05ab245-2bd1-7865-e7ed-1461a5a6155f" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_CommonStockValue_f05ab245-2bd1-7865-e7ed-1461a5a6155f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AdditionalPaidInCapitalCommonStock" xlink:label="loc_us-gaap_AdditionalPaidInCapitalCommonStock_9a00ddef-ccc2-f99c-735a-66b1e1849bbf" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_AdditionalPaidInCapitalCommonStock_9a00ddef-ccc2-f99c-735a-66b1e1849bbf" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="loc_us-gaap_RetainedEarningsAccumulatedDeficit_62305d8f-d807-0fe8-d0ab-f2c2b3d03011" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_RetainedEarningsAccumulatedDeficit_62305d8f-d807-0fe8-d0ab-f2c2b3d03011" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax" xlink:label="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_988c1346-b444-a867-fe80-f3aec1443d54" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_AccumulatedOtherComprehensiveIncomeLossNetOfTax_988c1346-b444-a867-fe80-f3aec1443d54" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_TreasuryStockValue" xlink:label="loc_us-gaap_TreasuryStockValue_e6069c8d-dfec-45ff-4b3f-643d125d5b29" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2605fa18-bbd8-c7d7-35fc-aace43a8c019" xlink:to="loc_us-gaap_TreasuryStockValue_e6069c8d-dfec-45ff-4b3f-643d125d5b29" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Assets" xlink:label="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AssetsCurrent" xlink:label="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashCashEquivalentsAndShortTermInvestments" xlink:label="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1d7d62fd-5623-ab03-8ce3-e6fe18cc8f1a" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1d7d62fd-5623-ab03-8ce3-e6fe18cc8f1a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1de780cc-9607-daa3-0bed-03c88ae94769" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1d7d62fd-5623-ab03-8ce3-e6fe18cc8f1a" xlink:to="loc_us-gaap_CashAndCashEquivalentsAtCarryingValue_1de780cc-9607-daa3-0bed-03c88ae94769" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesCurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesCurrent_e7486c7f-4b4f-6b90-afb9-63828afa66f9" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashCashEquivalentsAndShortTermInvestments_1d7d62fd-5623-ab03-8ce3-e6fe18cc8f1a" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesCurrent_e7486c7f-4b4f-6b90-afb9-63828afa66f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccountsReceivableNetCurrent" xlink:label="loc_us-gaap_AccountsReceivableNetCurrent_dd2cbe99-77d2-db20-3c91-750589881c79" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_AccountsReceivableNetCurrent_dd2cbe99-77d2-db20-3c91-750589881c79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidTaxes" xlink:label="loc_us-gaap_PrepaidTaxes_b440a9f7-3d5a-6822-147c-8733078e4b39" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_PrepaidTaxes_b440a9f7-3d5a-6822-147c-8733078e4b39" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_AssetsCurrent_0b3bd361-d592-2906-279e-2682647fdd27" xlink:to="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingLeaseRightOfUseAsset" xlink:label="loc_us-gaap_OperatingLeaseRightOfUseAsset_dcf3df0d-2155-35f6-715d-83a9bc9cf3fb" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_OperatingLeaseRightOfUseAsset_dcf3df0d-2155-35f6-715d-83a9bc9cf3fb" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AvailableForSaleSecuritiesNoncurrent" xlink:label="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_fc98a957-80da-2344-7ed0-5b5c2c583d7a" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_AvailableForSaleSecuritiesNoncurrent_fc98a957-80da-2344-7ed0-5b5c2c583d7a" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_37b440e2-656c-b624-0688-b7cf681bf981" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_Goodwill_37b440e2-656c-b624-0688-b7cf681bf981" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8889606b-88fa-2d5e-3fb9-238bccdf9597" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_8889606b-88fa-2d5e-3fb9-238bccdf9597" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsNetNoncurrent" xlink:label="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_bbb01acc-70d2-259a-f768-1ceaf51bbe97" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_DeferredTaxAssetsNetNoncurrent_bbb01acc-70d2-259a-f768-1ceaf51bbe97" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsNoncurrent" xlink:label="loc_us-gaap_OtherAssetsNoncurrent_bd8545de-cfc2-6f31-bff6-ed0d4012c357" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Assets_17ef3f41-42f7-52c0-cba1-93e7e0e1116a" xlink:to="loc_us-gaap_OtherAssetsNoncurrent_bd8545de-cfc2-6f31-bff6-ed0d4012c357" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/ConsolidatedStatementsOfCashFlows" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease" xlink:label="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_b2425514-ebf2-89bc-8a6a-e6b6edfea6c3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_b2425514-ebf2-89bc-8a6a-e6b6edfea6c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_ebef248a-da21-637d-9d28-3d42ff90e8e2" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_DepreciationDepletionAndAmortization_ebef248a-da21-637d-9d28-3d42ff90e8e2" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Operatingleaserightofuseassetamortization" xlink:label="loc_icui_Operatingleaserightofuseassetamortization_5136e923-3186-df42-22c0-17dc32c51283" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_Operatingleaserightofuseassetamortization_5136e923-3186-df42-22c0-17dc32c51283" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProvisionForDoubtfulAccounts" xlink:label="loc_us-gaap_ProvisionForDoubtfulAccounts_5ae19a9f-6de6-075a-2c5a-a587d82ebad5" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ProvisionForDoubtfulAccounts_5ae19a9f-6de6-075a-2c5a-a587d82ebad5" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_ProvisionForWarrantyAndReturns" xlink:label="loc_icui_ProvisionForWarrantyAndReturns_d9719b49-d4ea-3cec-625e-17dc32651e1e" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_ProvisionForWarrantyAndReturns_d9719b49-d4ea-3cec-625e-17dc32651e1e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ShareBasedCompensation" xlink:label="loc_us-gaap_ShareBasedCompensation_f0b9d825-b0b9-37fd-4d25-9294a8598890" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ShareBasedCompensation_f0b9d825-b0b9-37fd-4d25-9294a8598890" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GainLossOnSaleOfPropertyPlantEquipment" xlink:label="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ae064a9e-7563-5fa2-95b8-bfe0f620685d" xlink:type="locator" />
    <link:calculationArc order="7" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_GainLossOnSaleOfPropertyPlantEquipment_ae064a9e-7563-5fa2-95b8-bfe0f620685d" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Productrationalization" xlink:label="loc_icui_Productrationalization_72e14e6f-bef4-6a22-f787-80d234851775" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_Productrationalization_72e14e6f-bef4-6a22-f787-80d234851775" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfIntangibleAssetsFinitelived" xlink:label="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_4249c3f2-ecf9-9ccb-d59f-7105bef58b52" xlink:type="locator" />
    <link:calculationArc order="9" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ImpairmentOfIntangibleAssetsFinitelived_4249c3f2-ecf9-9ccb-d59f-7105bef58b52" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InvestmentIncomeAmortizationOfPremium" xlink:label="loc_us-gaap_InvestmentIncomeAmortizationOfPremium_bb9bf802-e6b4-8fac-4bbb-f6618f5d853b" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_InvestmentIncomeAmortizationOfPremium_bb9bf802-e6b4-8fac-4bbb-f6618f5d853b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="loc_us-gaap_AmortizationOfFinancingCosts_149d6655-b7f8-5049-ef74-296db479f8f9" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_AmortizationOfFinancingCosts_149d6655-b7f8-5049-ef74-296db479f8f9" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Addbacknoncashimpairmenttonetincome" xlink:label="loc_icui_Addbacknoncashimpairmenttonetincome_81f3d970-b58d-4dd6-613e-80d234426dd9" xlink:type="locator" />
    <link:calculationArc order="12" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_Addbacknoncashimpairmenttonetincome_81f3d970-b58d-4dd6-613e-80d234426dd9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_3780ca4f-adc1-a78c-5fcb-b636cc60c0bd" xlink:type="locator" />
    <link:calculationArc order="13" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_3780ca4f-adc1-a78c-5fcb-b636cc60c0bd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_64118bb2-1b72-460a-8e47-0026dedd2749" xlink:type="locator" />
    <link:calculationArc order="14" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_64118bb2-1b72-460a-8e47-0026dedd2749" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Sparepartsusage" xlink:label="loc_icui_Sparepartsusage_4abb22fb-9cdc-f892-5e77-17dc32b714da" xlink:type="locator" />
    <link:calculationArc order="15" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_Sparepartsusage_4abb22fb-9cdc-f892-5e77-17dc32b714da" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherOperatingActivitiesCashFlowStatement" xlink:label="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_1571e7d6-d666-48e2-395f-6e58ea563df3" xlink:type="locator" />
    <link:calculationArc order="16" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_OtherOperatingActivitiesCashFlowStatement_1571e7d6-d666-48e2-395f-6e58ea563df3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsReceivable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_09b7b41a-f5a1-c45e-d61b-846fff462802" xlink:type="locator" />
    <link:calculationArc order="17" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsReceivable_09b7b41a-f5a1-c45e-d61b-846fff462802" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInInventories" xlink:label="loc_us-gaap_IncreaseDecreaseInInventories_f2b34f8d-2445-12ee-2c68-fa0c5409d5e0" xlink:type="locator" />
    <link:calculationArc order="18" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInInventories_f2b34f8d-2445-12ee-2c68-fa0c5409d5e0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_dfcbd6f7-83fa-00c2-bd9e-6c5c1de7d890" xlink:type="locator" />
    <link:calculationArc order="19" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets_dfcbd6f7-83fa-00c2-bd9e-6c5c1de7d890" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent" xlink:label="loc_us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent_9c550203-8ef6-444e-5313-a000423f8d63" xlink:type="locator" />
    <link:calculationArc order="20" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInDueFromRelatedPartiesCurrent_9c550203-8ef6-444e-5313-a000423f8d63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInOtherOperatingAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_5550ae9d-a6e2-fc35-fc50-54521e2bfb5d" xlink:type="locator" />
    <link:calculationArc order="21" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInOtherOperatingAssets_5550ae9d-a6e2-fc35-fc50-54521e2bfb5d" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccountsPayable" xlink:label="loc_us-gaap_IncreaseDecreaseInAccountsPayable_792166b2-b561-55ef-12fd-ca8b50f64a38" xlink:type="locator" />
    <link:calculationArc order="22" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccountsPayable_792166b2-b561-55ef-12fd-ca8b50f64a38" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilities" xlink:label="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_c8705fc2-a98a-ac1d-2832-812bd5cae0da" xlink:type="locator" />
    <link:calculationArc order="23" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_IncreaseDecreaseInAccruedLiabilities_c8705fc2-a98a-ac1d-2832-812bd5cae0da" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_IncreaseDecreaseinincometaxesincludingexcesstaxbenefitsanddeferredincometaxes" xlink:label="loc_icui_IncreaseDecreaseinincometaxesincludingexcesstaxbenefitsanddeferredincometaxes_e34236f3-7e50-6ee3-67d3-17dc329ea233" xlink:type="locator" />
    <link:calculationArc order="24" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_icui_IncreaseDecreaseinincometaxesincludingexcesstaxbenefitsanddeferredincometaxes_e34236f3-7e50-6ee3-67d3-17dc329ea233" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b48b201b-d3fe-1be2-7892-fb2dd4b51cb2" xlink:type="locator" />
    <link:calculationArc order="25" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInOperatingActivities_ce0d7b63-a366-bc9b-79e1-780981e428fe" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b48b201b-d3fe-1be2-7892-fb2dd4b51cb2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInInvestingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_b2425514-ebf2-89bc-8a6a-e6b6edfea6c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquirePropertyPlantAndEquipment" xlink:label="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0f8df60b-841f-6df5-83c3-e4049d366459" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquirePropertyPlantAndEquipment_0f8df60b-841f-6df5-83c3-e4049d366459" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_578f24f8-46e7-25b5-2c9d-a8a5bbd8f335" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_ProceedsFromSaleOfProductiveAssets_578f24f8-46e7-25b5-2c9d-a8a5bbd8f335" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleOfOtherProductiveAssets" xlink:label="loc_us-gaap_ProceedsFromSaleOfOtherProductiveAssets_5ac93ec7-cab3-d4c2-b2fd-58ad183a0924" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_ProceedsFromSaleOfOtherProductiveAssets_5ac93ec7-cab3-d4c2-b2fd-58ad183a0924" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireIntangibleAssets" xlink:label="loc_us-gaap_PaymentsToAcquireIntangibleAssets_fabd36b2-0d2f-8f1e-b9c9-718513456b78" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquireIntangibleAssets_fabd36b2-0d2f-8f1e-b9c9-718513456b78" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired" xlink:label="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6abb14d9-7978-302d-af6b-dbfc88f76bf2" xlink:type="locator" />
    <link:calculationArc order="5" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired_6abb14d9-7978-302d-af6b-dbfc88f76bf2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsToAcquireMarketableSecurities" xlink:label="loc_us-gaap_PaymentsToAcquireMarketableSecurities_f6cd34b6-f238-abf8-9b6c-ac9d5fcdd140" xlink:type="locator" />
    <link:calculationArc order="6" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_PaymentsToAcquireMarketableSecurities_f6cd34b6-f238-abf8-9b6c-ac9d5fcdd140" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities" xlink:label="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_53ccf68b-cae8-c2bb-bc94-e3588a9c5ab9" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInInvestingActivities_0f07a806-a2da-6d18-a7a9-d734fad1f3b0" xlink:to="loc_us-gaap_ProceedsFromSaleAndMaturityOfMarketableSecurities_53ccf68b-cae8-c2bb-bc94-e3588a9c5ab9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_b2425514-ebf2-89bc-8a6a-e6b6edfea6c3" xlink:to="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="loc_us-gaap_RepaymentsOfLongTermDebt_50c96d39-6558-6bd8-b3d6-7ed1c558807e" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_RepaymentsOfLongTermDebt_50c96d39-6558-6bd8-b3d6-7ed1c558807e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockOptionsExercised" xlink:label="loc_us-gaap_ProceedsFromStockOptionsExercised_f73833cd-0af4-c4d5-a7c4-1151269f1da3" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_ProceedsFromStockOptionsExercised_f73833cd-0af4-c4d5-a7c4-1151269f1da3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ProceedsFromStockPlans" xlink:label="loc_us-gaap_ProceedsFromStockPlans_b130e83a-7e35-8950-f084-78ccb28f2eab" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_ProceedsFromStockPlans_b130e83a-7e35-8950-f084-78ccb28f2eab" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_3f804297-91a1-3939-541d-a39b6288c9f9" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetCashProvidedByUsedInFinancingActivities_1efd93c0-bb90-2a64-a997-3a70afaa3faa" xlink:to="loc_us-gaap_PaymentsForRepurchaseOfCommonStock_3f804297-91a1-3939-541d-a39b6288c9f9" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents" xlink:label="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_32f0c8eb-accb-9ab7-5d53-b9d2845af404" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease_b2425514-ebf2-89bc-8a6a-e6b6edfea6c3" xlink:to="loc_us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents_32f0c8eb-accb-9ab7-5d53-b9d2845af404" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/ConsolidatedStatementsOfIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments" xlink:label="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:to="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingIncomeLoss" xlink:label="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_GrossProfit" xlink:label="loc_us-gaap_GrossProfit_98c25af7-47ba-69a3-12c4-e52bd51b359e" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:to="loc_us-gaap_GrossProfit_98c25af7-47ba-69a3-12c4-e52bd51b359e" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_Revenues" xlink:label="loc_us-gaap_Revenues_425ada39-f194-a279-47ac-dd09cf899fb1" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_98c25af7-47ba-69a3-12c4-e52bd51b359e" xlink:to="loc_us-gaap_Revenues_425ada39-f194-a279-47ac-dd09cf899fb1" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax" xlink:label="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b88c060f-09b3-b6c0-4cdb-a77cb8e75ec8" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_Revenues_425ada39-f194-a279-47ac-dd09cf899fb1" xlink:to="loc_us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax_b88c060f-09b3-b6c0-4cdb-a77cb8e75ec8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_CostOfGoodsAndServicesSold" xlink:label="loc_us-gaap_CostOfGoodsAndServicesSold_3549c1c0-2f2a-e44b-026b-b4042153e489" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_GrossProfit_98c25af7-47ba-69a3-12c4-e52bd51b359e" xlink:to="loc_us-gaap_CostOfGoodsAndServicesSold_3549c1c0-2f2a-e44b-026b-b4042153e489" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OperatingExpenses" xlink:label="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingIncomeLoss_8db01d6d-ae17-523f-94b9-8ab4add4a22e" xlink:to="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_SellingGeneralAndAdministrativeExpense" xlink:label="loc_us-gaap_SellingGeneralAndAdministrativeExpense_89fcc343-1933-1e77-588e-68d1c2f1a04f" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_us-gaap_SellingGeneralAndAdministrativeExpense_89fcc343-1933-1e77-588e-68d1c2f1a04f" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ResearchAndDevelopmentExpense" xlink:label="loc_us-gaap_ResearchAndDevelopmentExpense_ef2ac9e8-006f-b467-3389-9a8ceec4bee5" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_us-gaap_ResearchAndDevelopmentExpense_ef2ac9e8-006f-b467-3389-9a8ceec4bee5" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Restructuringandstrategictransactionexpense" xlink:label="loc_icui_Restructuringandstrategictransactionexpense_85b7215c-b683-0d55-f5c8-80d235428f74" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_icui_Restructuringandstrategictransactionexpense_85b7215c-b683-0d55-f5c8-80d235428f74" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_64118bb2-1b72-460a-8e47-0026dedd2749" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_64118bb2-1b72-460a-8e47-0026dedd2749" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Contractsettlements" xlink:label="loc_icui_Contractsettlements_98ad0f50-6ea6-e919-f008-80d234eb4c42" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_icui_Contractsettlements_98ad0f50-6ea6-e919-f008-80d234eb4c42" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf" xlink:label="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b48b201b-d3fe-1be2-7892-fb2dd4b51cb2" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_OperatingExpenses_56807cce-1c23-b2ed-01fd-e029fa0d6e79" xlink:to="loc_us-gaap_ImpairmentOfLongLivedAssetsToBeDisposedOf_b48b201b-d3fe-1be2-7892-fb2dd4b51cb2" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NonoperatingIncomeExpense" xlink:label="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_NonoperatingIncomeExpense_28fe77ae-e122-e428-d718-aff2ad445bc8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_3780ca4f-adc1-a78c-5fcb-b636cc60c0bd" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_3780ca4f-adc1-a78c-5fcb-b636cc60c0bd" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InterestExpense" xlink:label="loc_us-gaap_InterestExpense_16e9f6a6-5524-a7b1-7e7c-73ee97610ec6" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments_d71649eb-5769-933d-7982-2a2ada9ea257" xlink:to="loc_us-gaap_InterestExpense_16e9f6a6-5524-a7b1-7e7c-73ee97610ec6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:to="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/ConsolidatedStatementsOfStockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeBalanceSheetLocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesAmountsAffectingConsolidatedStatementsOfIncomeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDerivativeInstrumentsAndHedgingActivitiesCashFlowHedgeActivityIncludedInAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DerivativesAndHedgingActivitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/DocumentAndEntityInformationDocument" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesHospiraQuantitativeInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesPursuitQuantitativeInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementFairValueMeasurementsRecurringBasisDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/FairValueMeasurementTextDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesAdvertisingExpensesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesBasisOfPresentationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesForeignCurrencyDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesFutureEstimatedAmortizationExpenseDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesGoodwillDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets1Details" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesIntangibleAssets2Details" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesInventoryDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryNet" xlink:label="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryRawMaterials" xlink:label="loc_us-gaap_InventoryRawMaterials_fc662cb4-22a7-eaf1-57df-aa538af7744b" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:to="loc_us-gaap_InventoryRawMaterials_fc662cb4-22a7-eaf1-57df-aa538af7744b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryWorkInProcess" xlink:label="loc_us-gaap_InventoryWorkInProcess_02c38264-930d-9c2f-e0a7-6a0838599d0b" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:to="loc_us-gaap_InventoryWorkInProcess_02c38264-930d-9c2f-e0a7-6a0838599d0b" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_InventoryFinishedGoods" xlink:label="loc_us-gaap_InventoryFinishedGoods_4b469d73-0d86-8f9c-e98a-661ef709c068" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_InventoryNet_cc720f44-4c90-5acc-2e7e-b88e80f2af28" xlink:to="loc_us-gaap_InventoryFinishedGoods_4b469d73-0d86-8f9c-e98a-661ef709c068" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesInvestmentsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesNetIncomePerShareDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesNewAccountingPronouncementsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPostRetirementAndPostEmploymentBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment1Details" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_94cd7971-9d17-1c6e-6642-d4d38fb682b6" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:to="loc_us-gaap_PropertyPlantAndEquipmentGross_94cd7971-9d17-1c6e-6642-d4d38fb682b6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7b7a3a8d-eb3d-0c85-68cc-b3d4d184ff23" xlink:type="locator" />
    <link:calculationArc order="2" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_4246ec24-1a4c-19dd-57c9-32d4a8e0cbaa" xlink:to="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_7b7a3a8d-eb3d-0c85-68cc-b3d4d184ff23" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment2Details" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesPropertyAndEquipment3Details" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeneralAndSummaryOfSignificantAccountingPoliciesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationAndSignificantCustomersNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersGeographicInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/GeographicInformationAndSignificantCustomersLongLivedAssetsByGeographicLocationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesChangeInTaxesPayableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesDeferredIncomeTaxAssetsLiabilitiesDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxAssetsLiabilitiesNet" xlink:label="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0bdbea13-bfd8-228d-43ea-fae0c1330aaa" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredTaxLiabilities" xlink:label="loc_us-gaap_DeferredTaxLiabilities_f31cb66e-0de8-54fb-4788-53b3cde0ec2f" xlink:type="locator" />
    <link:calculationArc order="1" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_DeferredTaxAssetsLiabilitiesNet_0bdbea13-bfd8-228d-43ea-fae0c1330aaa" xlink:to="loc_us-gaap_DeferredTaxLiabilities_f31cb66e-0de8-54fb-4788-53b3cde0ec2f" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesDeferredIncomeTaxProvisionDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesEffectiveTaxRateDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate" xlink:label="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_7c7e16b8-0aa9-c1c4-f1b1-272374ca83dc" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate_7c7e16b8-0aa9-c1c4-f1b1-272374ca83dc" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes" xlink:label="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_f57a32ed-0dd0-7e89-043f-8fdc81833b87" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_IncomeTaxReconciliationStateAndLocalIncomeTaxes_f57a32ed-0dd0-7e89-043f-8fdc81833b87" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationTaxCredits" xlink:label="loc_us-gaap_IncomeTaxReconciliationTaxCredits_c4fdeb46-4aee-508e-a0bc-a3b116ae2542" xlink:type="locator" />
    <link:calculationArc order="3" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_IncomeTaxReconciliationTaxCredits_c4fdeb46-4aee-508e-a0bc-a3b116ae2542" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_GILTItaxexpense" xlink:label="loc_icui_GILTItaxexpense_b16c00aa-807c-fed5-4743-80d234d3cae3" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_icui_GILTItaxexpense_b16c00aa-807c-fed5-4743-80d234d3cae3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential" xlink:label="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_e124023a-4116-8f49-30c1-60c50fde5ff8" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_IncomeTaxReconciliationForeignIncomeTaxRateDifferential_e124023a-4116-8f49-30c1-60c50fde5ff8" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount" xlink:label="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_293be6dc-6bee-7ef3-e6e4-ebd60965ac94" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_EffectiveIncomeTaxRateReconciliationShareBasedCompensationExcessTaxBenefitAmount_293be6dc-6bee-7ef3-e6e4-ebd60965ac94" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Taxreform" xlink:label="loc_icui_Taxreform_8220f5b9-807f-80f7-dc0e-80d2340dff4e" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_icui_Taxreform_8220f5b9-807f-80f7-dc0e-80d2340dff4e" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_EffectiveIncomeTaxRateReconciliationIPMigration" xlink:label="loc_icui_EffectiveIncomeTaxRateReconciliationIPMigration_238231f9-2713-90e2-9a96-80d234ee8eac" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_icui_EffectiveIncomeTaxRateReconciliationIPMigration_238231f9-2713-90e2-9a96-80d234ee8eac" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_EffectiveIncomeTaxRateReconciliationBargainPurchaseGain" xlink:label="loc_icui_EffectiveIncomeTaxRateReconciliationBargainPurchaseGain_31fbae73-204b-308c-c2c4-80d23474e35e" xlink:type="locator" />
    <link:calculationArc order="9" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_icui_EffectiveIncomeTaxRateReconciliationBargainPurchaseGain_31fbae73-204b-308c-c2c4-80d23474e35e" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Effectiveincometaxreconciliationnondeductiblecompensation" xlink:label="loc_icui_Effectiveincometaxreconciliationnondeductiblecompensation_10996406-454d-b134-d39b-80d234305f20" xlink:type="locator" />
    <link:calculationArc order="10" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_icui_Effectiveincometaxreconciliationnondeductiblecompensation_10996406-454d-b134-d39b-80d234305f20" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_IncomeTaxReconciliationOtherAdjustments" xlink:label="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_49a08e86-47b2-01fa-94cc-0320e102ec63" xlink:type="locator" />
    <link:calculationArc order="11" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_IncomeTaxExpenseBenefit_666ca9f0-28f1-b21a-025e-36222808a6c3" xlink:to="loc_us-gaap_IncomeTaxReconciliationOtherAdjustments_49a08e86-47b2-01fa-94cc-0320e102ec63" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesIncomeFromContinuingOperationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesIncomeTaxDisclosureTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesOperatingLossCarryforwardsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesProvisionForIncomeTaxesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesTaxBenefitFromExerciseOfStockOptionsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesTaxCarryforwardsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesTaxHolidayDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesTaxReformDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesUndistributedForeignEarningsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesBalanceSheetLeaseAccountsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesLeaseCostDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesLeaseCostTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesLeaseMaturitiesTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesLeaseMaturityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesSupplementalBalanceSheetLeaseInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesSupplementalCashFlowLeaseInformationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LeasesSupplementalCashFlowLeaseInformationTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LongTermObligationsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LongTermObligationsLineOfCreditPricingDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LongTermObligationsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LongTermObligationsSeniorNoteDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/LongTermObligationsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsPrepaidExpensesAndOtherCurrentAssetsDetails" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_PrepaidExpenseAndOtherAssetsCurrent" xlink:label="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DepositAssets" xlink:label="loc_us-gaap_DepositAssets_bbd00048-67e7-ec73-ce95-dda7c9e64d63" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_us-gaap_DepositAssets_bbd00048-67e7-ec73-ce95-dda7c9e64d63" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherPrepaidExpenseCurrent" xlink:label="loc_us-gaap_OtherPrepaidExpenseCurrent_e071180e-9247-8e76-a8ee-96a3f4d29760" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_us-gaap_OtherPrepaidExpenseCurrent_e071180e-9247-8e76-a8ee-96a3f4d29760" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherReceivables" xlink:label="loc_us-gaap_OtherReceivables_2b6786f7-f0ac-ae2d-8636-dfa89d5d2aa6" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_us-gaap_OtherReceivables_2b6786f7-f0ac-ae2d-8636-dfa89d5d2aa6" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_DeferredCostsAndOtherAssets" xlink:label="loc_us-gaap_DeferredCostsAndOtherAssets_fdb96cdf-4cd8-10f1-8f25-ce8d0e75892e" xlink:type="locator" />
    <link:calculationArc order="4" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_us-gaap_DeferredCostsAndOtherAssets_fdb96cdf-4cd8-10f1-8f25-ce8d0e75892e" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Prepaidinsuranceandpropertytaxes" xlink:label="loc_icui_Prepaidinsuranceandpropertytaxes_8dc329fb-cc07-3b53-e0f0-17dc328174ba" xlink:type="locator" />
    <link:calculationArc order="5" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_icui_Prepaidinsuranceandpropertytaxes_8dc329fb-cc07-3b53-e0f0-17dc328174ba" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Prepaidothertaxes" xlink:label="loc_icui_Prepaidothertaxes_fb839858-5d09-94e7-46eb-17dc32939a2d" xlink:type="locator" />
    <link:calculationArc order="6" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_icui_Prepaidothertaxes_fb839858-5d09-94e7-46eb-17dc32939a2d" xlink:type="arc" />
    <link:loc xlink:href="icui-20191231.xsd#icui_Deferredtaxcharge" xlink:label="loc_icui_Deferredtaxcharge_b61c7304-49bf-a686-161c-17dc3258cb7c" xlink:type="locator" />
    <link:calculationArc order="7" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_icui_Deferredtaxcharge_b61c7304-49bf-a686-161c-17dc3258cb7c" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherAssetsCurrent" xlink:label="loc_us-gaap_OtherAssetsCurrent_7832082e-fa39-48cc-a655-249c101debf9" xlink:type="locator" />
    <link:calculationArc order="8" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_PrepaidExpenseAndOtherAssetsCurrent_5fd9c643-899e-95d7-aab9-c3a9d6240218" xlink:to="loc_us-gaap_OtherAssetsCurrent_7832082e-fa39-48cc-a655-249c101debf9" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsRelatedPartyDetailsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/PrepaidsAndOtherCurrentAssetsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationDetails1" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationDetails2" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationScheduleOfRestructuringAndRelatedCostsTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RestructuringStrategicTransactionAndIntegrationStrategicTransactionAndIntegrationExpensesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueContractLiabilitiesDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueContractLiabilitiesTextDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueDisaggregationOfRevenueByGeographyDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueDisaggregationOfRevenueProductLineDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/RevenueTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnaudited" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/SelectedQuarterlyFinancialDataUnauditedTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardEsppNarrativeDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardEsppTableDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardOptionsExercisedDataDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardRestrictedStockUnitsDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardShareAwardDataDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardShareAwardsNotes" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardStockBasedCompensationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardStockOptionActivityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardStockOptionPlansDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardStockOptionsGrantedAndValuationDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/ShareBasedAwardTables" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/StatementOfComprehensiveIncome" xlink:type="extended">
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_ComprehensiveIncomeNetOfTax" xlink:label="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:type="locator" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_NetIncomeLoss" xlink:label="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="locator" />
    <link:calculationArc order="1" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_NetIncomeLoss_e170ce1e-c3a8-e8ee-88b0-37e8dd7b1d11" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_2efcb6ae-5d3a-652c-5e64-2f0332c3d5a3" xlink:type="locator" />
    <link:calculationArc order="2" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax_2efcb6ae-5d3a-652c-5e64-2f0332c3d5a3" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent" xlink:label="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_71d11517-34f8-505e-4c4b-e25ef3111aee" xlink:type="locator" />
    <link:calculationArc order="3" weight="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent_71d11517-34f8-505e-4c4b-e25ef3111aee" xlink:type="arc" />
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2019/elts/us-gaap-2019-01-31.xsd#us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax" xlink:label="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_bfbc3edc-1edc-bfc6-c7b6-fb403917e31e" xlink:type="locator" />
    <link:calculationArc order="4" weight="-1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/summation-item" xlink:from="loc_us-gaap_ComprehensiveIncomeNetOfTax_5c8b3520-1ca2-0a91-0912-70d62831826c" xlink:to="loc_us-gaap_OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax_bfbc3edc-1edc-bfc6-c7b6-fb403917e31e" xlink:type="arc" />
  </link:calculationLink>
  <link:calculationLink xlink:role="http://www.icumed.com/role/StockholdersEquity" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/StockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/StockholdersEquityDetails" xlink:type="extended" />
  <link:calculationLink xlink:role="http://www.icumed.com/role/StockholdersEquityTables" xlink:type="extended" />
</link:linkbase>
