<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2022 Workiva-->
<!--r:79121b2d-e854-41aa-aab3-7b5c5847e030,g:aa7e8fee-abd8-4fff-b3c4-f8ba25538e22-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:icui="http://www.icumed.com/20211231" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.icumed.com/20211231">
  <xs:import namespace="http://fasb.org/srt/2021-01-31" schemaLocation="https://xbrl.fasb.org/srt/2021/elts/srt-2021-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2021-01-31" schemaLocation="https://xbrl.fasb.org/us-gaap/2021/elts/us-gaap-2021-01-31.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2021" schemaLocation="https://xbrl.sec.gov/country/2021/country-2021.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2021q4" schemaLocation="https://xbrl.sec.gov/dei/2021q4/dei-2021q4.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="icui-20211231_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="icui-20211231_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="icui-20211231_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="icui-20211231_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="DocumentandEntityInformationDocument" roleURI="http://www.icumed.com/role/DocumentandEntityInformationDocument">
        <link:definition>000010001 - Document - Document and Entity Information Document</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AuditInformation" roleURI="http://www.icumed.com/role/AuditInformation">
        <link:definition>000020002 - Document - Audit Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheets" roleURI="http://www.icumed.com/role/ConsolidatedBalanceSheets">
        <link:definition>100010003 - Statement - Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedBalanceSheetsParenthetical" roleURI="http://www.icumed.com/role/ConsolidatedBalanceSheetsParenthetical">
        <link:definition>140024001 - Statement - Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofIncome" roleURI="http://www.icumed.com/role/ConsolidatedStatementsofIncome">
        <link:definition>100030004 - Statement - Consolidated Statements of Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementofComprehensiveIncome" roleURI="http://www.icumed.com/role/StatementofComprehensiveIncome">
        <link:definition>100040005 - Statement - Statement of Comprehensive Income</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StatementofComprehensiveIncomeParenthetical" roleURI="http://www.icumed.com/role/StatementofComprehensiveIncomeParenthetical">
        <link:definition>140054002 - Statement - Statement of Comprehensive Income (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofStockholdersEquity" roleURI="http://www.icumed.com/role/ConsolidatedStatementsofStockholdersEquity">
        <link:definition>100060006 - Statement - Consolidated Statements of Stockholders Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ConsolidatedStatementsofCashFlows" roleURI="http://www.icumed.com/role/ConsolidatedStatementsofCashFlows">
        <link:definition>100070007 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPolicies" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPolicies">
        <link:definition>210011001 - Disclosure - General and Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>220022001 - Disclosure - General and Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesTables" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesTables">
        <link:definition>230033001 - Disclosure - General and Summary of Significant Accounting Policies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesBasisofPresentationDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesBasisofPresentationDetails">
        <link:definition>240044003 - Disclosure - General and Summary of Significant Accounting Policies Basis of Presentation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesInventoryDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesInventoryDetails">
        <link:definition>240054004 - Disclosure - General and Summary of Significant Accounting Policies Inventory (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment1Details" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment1Details">
        <link:definition>240064005 - Disclosure - General and Summary of Significant Accounting Policies Property and Equipment #1 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment2Details" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment2Details">
        <link:definition>240074006 - Disclosure - General and Summary of Significant Accounting Policies Property and Equipment #2 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment3Details" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesPropertyandEquipment3Details">
        <link:definition>240084007 - Disclosure - General and Summary of Significant Accounting Policies Property and Equipment #3 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesGoodwillDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesGoodwillDetails">
        <link:definition>240094008 - Disclosure - General and Summary of Significant Accounting Policies Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesIntangibleAssets1Details" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesIntangibleAssets1Details">
        <link:definition>240104009 - Disclosure - General and Summary of Significant Accounting Policies Intangible Assets #1 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesIntangibleAssets2Details" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesIntangibleAssets2Details">
        <link:definition>240114010 - Disclosure - General and Summary of Significant Accounting Policies Intangible Assets #2 (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesFutureEstimatedAmortizationExpenseDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesFutureEstimatedAmortizationExpenseDetails">
        <link:definition>240124011 - Disclosure - General and Summary of Significant Accounting Policies Future Estimated Amortization Expense (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesInvestmentsDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesInvestmentsDetails">
        <link:definition>240134012 - Disclosure - General and Summary of Significant Accounting Policies Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesInvestmentsEquityMethodDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesInvestmentsEquityMethodDetails">
        <link:definition>240144013 - Disclosure - General and Summary of Significant Accounting Policies Investments-Equity Method (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesForeignCurrencyDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesForeignCurrencyDetails">
        <link:definition>240154014 - Disclosure - General and Summary of Significant Accounting Policies Foreign Currency (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesAdvertisingExpensesDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesAdvertisingExpensesDetails">
        <link:definition>240164015 - Disclosure - General and Summary of Significant Accounting Policies Advertising Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesPostretirementandPostemploymentBenefitsDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesPostretirementandPostemploymentBenefitsDetails">
        <link:definition>240174016 - Disclosure - General and Summary of Significant Accounting Policies Post-retirement and Post-employment Benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesNetIncomePerShareDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesNetIncomePerShareDetails">
        <link:definition>240184017 - Disclosure - General and Summary of Significant Accounting Policies Net Income Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeneralandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails" roleURI="http://www.icumed.com/role/GeneralandSummaryofSignificantAccountingPoliciesNewAccountingPronouncementsDetails">
        <link:definition>240194018 - Disclosure - General and Summary of Significant Accounting Policies New Accounting Pronouncements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsNotes" roleURI="http://www.icumed.com/role/AcquisitionsNotes">
        <link:definition>210201002 - Disclosure - Acquisitions (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsPursuitVascularTables" roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularTables">
        <link:definition>230213002 - Disclosure - Acquisitions Pursuit Vascular (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTextDetails" roleURI="http://www.icumed.com/role/AcquisitionsTextDetails">
        <link:definition>240224019 - Disclosure - Acquisitions Text (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsPursuitVascularTableDetails" roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularTableDetails">
        <link:definition>240234020 - Disclosure - Acquisitions Pursuit Vascular Table (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsPursuitVascularIntangibleDetails" roleURI="http://www.icumed.com/role/AcquisitionsPursuitVascularIntangibleDetails">
        <link:definition>240244021 - Disclosure - Acquisitions Pursuit Vascular Intangible (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsForeignInfusionSystemsSupplierDetails" roleURI="http://www.icumed.com/role/AcquisitionsForeignInfusionSystemsSupplierDetails">
        <link:definition>240254022 - Disclosure - Acquisitions Foreign Infusion Systems Supplier (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringStrategicTransactionandIntegrationNotes" roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionandIntegrationNotes">
        <link:definition>210261003 - Disclosure - Restructuring, Strategic Transaction and Integration (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringStrategicTransactionandIntegrationScheduleofRestructuringandRelatedCostsTables" roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionandIntegrationScheduleofRestructuringandRelatedCostsTables">
        <link:definition>230273003 - Disclosure - Restructuring, Strategic Transaction and Integration Schedule of Restructuring and Related Costs (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringStrategicTransactionandIntegrationDetails1" roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionandIntegrationDetails1">
        <link:definition>240284023 - Disclosure - Restructuring, Strategic Transaction and Integration (Details 1)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringStrategicTransactionandIntegrationDetails2" roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionandIntegrationDetails2">
        <link:definition>240294024 - Disclosure - Restructuring, Strategic Transaction and Integration (Details 2)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RestructuringStrategicTransactionandIntegrationStrategicTransactionandIntegrationExpensesDetails" roleURI="http://www.icumed.com/role/RestructuringStrategicTransactionandIntegrationStrategicTransactionandIntegrationExpensesDetails">
        <link:definition>240304025 - Disclosure - Restructuring, Strategic Transaction and Integration Strategic Transaction and Integration Expenses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueNotes" roleURI="http://www.icumed.com/role/RevenueNotes">
        <link:definition>210311004 - Disclosure - Revenue (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueTables" roleURI="http://www.icumed.com/role/RevenueTables">
        <link:definition>230323004 - Disclosure - Revenue (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDisaggregationofRevenueProductLineDetails" roleURI="http://www.icumed.com/role/RevenueDisaggregationofRevenueProductLineDetails">
        <link:definition>240334026 - Disclosure - Revenue Disaggregation of Revenue - Product Line (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueDisaggregationofRevenuebyGeographyDetails" roleURI="http://www.icumed.com/role/RevenueDisaggregationofRevenuebyGeographyDetails">
        <link:definition>240344027 - Disclosure - Revenue Disaggregation of Revenue by Geography (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueContractLiabilitiesDetails" roleURI="http://www.icumed.com/role/RevenueContractLiabilitiesDetails">
        <link:definition>240354028 - Disclosure - Revenue Contract Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueContractLiabilitiesTextDetails" roleURI="http://www.icumed.com/role/RevenueContractLiabilitiesTextDetails">
        <link:definition>240364029 - Disclosure - Revenue Contract Liabilities Text (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesNotes" roleURI="http://www.icumed.com/role/LeasesNotes">
        <link:definition>210371005 - Disclosure - Leases (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesTables" roleURI="http://www.icumed.com/role/LeasesTables">
        <link:definition>230383005 - Disclosure - Leases (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesDetails" roleURI="http://www.icumed.com/role/LeasesDetails">
        <link:definition>240394030 - Disclosure - Leases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesLeaseCostDetails" roleURI="http://www.icumed.com/role/LeasesLeaseCostDetails">
        <link:definition>240404031 - Disclosure - Leases Lease Cost (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesSupplementalCashFlowLeaseInformationDetails" roleURI="http://www.icumed.com/role/LeasesSupplementalCashFlowLeaseInformationDetails">
        <link:definition>240414032 - Disclosure - Leases Supplemental Cash Flow Lease Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesSupplementalBalanceSheetLeaseinformationDetails" roleURI="http://www.icumed.com/role/LeasesSupplementalBalanceSheetLeaseinformationDetails">
        <link:definition>240424033 - Disclosure - Leases Supplemental Balance Sheet Lease information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FinanceLeasesSupplementalBalanceSheetInformationDetails" roleURI="http://www.icumed.com/role/FinanceLeasesSupplementalBalanceSheetInformationDetails">
        <link:definition>240434034 - Disclosure - Finance Leases Supplemental Balance Sheet Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesLeaseMaturityDetails" roleURI="http://www.icumed.com/role/LeasesLeaseMaturityDetails">
        <link:definition>240444035 - Disclosure - Leases Lease Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LeasesFinanceLeaseMaturityDetails" roleURI="http://www.icumed.com/role/LeasesFinanceLeaseMaturityDetails">
        <link:definition>240454036 - Disclosure - Leases Finance Lease Maturity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardShareawardsNotes" roleURI="http://www.icumed.com/role/ShareBasedAwardShareawardsNotes">
        <link:definition>210461006 - Disclosure - Share Based Award Share awards (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardTables" roleURI="http://www.icumed.com/role/ShareBasedAwardTables">
        <link:definition>230473006 - Disclosure - Share Based Award (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardStockBasedCompensationDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardStockBasedCompensationDetails">
        <link:definition>240484037 - Disclosure - Share Based Award Stock Based Compensation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardStockOptionPlansDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionPlansDetails">
        <link:definition>240494038 - Disclosure - Share Based Award Stock Option Plans (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardStockOptionsGrantedandValuationDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionsGrantedandValuationDetails">
        <link:definition>240504039 - Disclosure - Share Based Award Stock Options Granted and Valuation (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardStockOptionActivityDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardStockOptionActivityDetails">
        <link:definition>240514040 - Disclosure - Share Based Award Stock Option Activity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardShareAwarddataDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardShareAwarddataDetails">
        <link:definition>240524041 - Disclosure - Share Based Award Share Award data (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardOptionsexerciseddataDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardOptionsexerciseddataDetails">
        <link:definition>240534042 - Disclosure - Share Based Award Options exercised data (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardRSUandPRSUDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardRSUandPRSUDetails">
        <link:definition>240544043 - Disclosure - Share Based Award RSU and PRSU (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardRSUandPRSURollforwardDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardRSUandPRSURollforwardDetails">
        <link:definition>240554044 - Disclosure - Share Based Award RSU and PRSU Roll forward (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="ShareBasedAwardESPPNarrativeDetails" roleURI="http://www.icumed.com/role/ShareBasedAwardESPPNarrativeDetails">
        <link:definition>240564045 - Disclosure - Share Based Award ESPP Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesNotes" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesNotes">
        <link:definition>210571007 - Disclosure - Derivatives and Hedging Activities (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesTables" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesTables">
        <link:definition>230583007 - Disclosure - Derivatives and Hedging Activities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesDetails" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesDetails">
        <link:definition>240594046 - Disclosure - Derivatives and Hedging Activities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesDerivativeBalanceSheetLocationDetails" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesDerivativeBalanceSheetLocationDetails">
        <link:definition>240604047 - Disclosure - Derivatives and Hedging Activities Derivative Balance Sheet Location (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesDerivativeInstrumentsandHedgingActivitiesAmountsAffectingConsolidatedStatementsofIncomeDetails" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesDerivativeInstrumentsandHedgingActivitiesAmountsAffectingConsolidatedStatementsofIncomeDetails">
        <link:definition>240614048 - Disclosure - Derivatives and Hedging Activities Derivative Instruments and Hedging Activities - Amounts Affecting Consolidated Statements of Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DerivativesandHedgingActivitiesDerivativeInstrumentsandHedgingActivitiesCashFlowHedgeActivityIncludedinAccumulatedOtherComprehensiveIncomeLossDetails" roleURI="http://www.icumed.com/role/DerivativesandHedgingActivitiesDerivativeInstrumentsandHedgingActivitiesCashFlowHedgeActivityIncludedinAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>240624049 - Disclosure - Derivatives and Hedging Activities Derivative Instruments and Hedging Activities - Cash Flow Hedge Activity Included in Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementNotes" roleURI="http://www.icumed.com/role/FairValueMeasurementNotes">
        <link:definition>210631008 - Disclosure - Fair Value Measurement (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementTables" roleURI="http://www.icumed.com/role/FairValueMeasurementTables">
        <link:definition>230643008 - Disclosure - Fair Value Measurement (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementTextDetails" roleURI="http://www.icumed.com/role/FairValueMeasurementTextDetails">
        <link:definition>240654050 - Disclosure - Fair Value Measurement Text (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementDetails" roleURI="http://www.icumed.com/role/FairValueMeasurementDetails">
        <link:definition>240664051 - Disclosure - Fair Value Measurement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementFairValueInputsLiabilitiesHospiraQuantitativeInformationDetails" roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesHospiraQuantitativeInformationDetails">
        <link:definition>240674052 - Disclosure - Fair Value Measurement Fair Value Inputs, Liabilities, Hospira Quantitative Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementFairValueInputsLiabilitiesPursuitQuantitativeInformationDetails" roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueInputsLiabilitiesPursuitQuantitativeInformationDetails">
        <link:definition>240684053 - Disclosure - Fair Value Measurement Fair Value Inputs, Liabilities, Pursuit Quantitative Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementFairValueMeasurementsRecurringBasisDetails" roleURI="http://www.icumed.com/role/FairValueMeasurementFairValueMeasurementsRecurringBasisDetails">
        <link:definition>240694054 - Disclosure - Fair Value Measurement Fair Value Measurements, Recurring Basis (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PrepaidsandOtherCurrentAssetsNotes" roleURI="http://www.icumed.com/role/PrepaidsandOtherCurrentAssetsNotes">
        <link:definition>210701009 - Disclosure - Prepaids and Other Current Assets (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PrepaidsandOtherCurrentAssetsTables" roleURI="http://www.icumed.com/role/PrepaidsandOtherCurrentAssetsTables">
        <link:definition>230713009 - Disclosure - Prepaids and Other Current Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PrepaidsandOtherCurrentAssetsPrepaidExpensesandOtherCurrentAssetsDetails" roleURI="http://www.icumed.com/role/PrepaidsandOtherCurrentAssetsPrepaidExpensesandOtherCurrentAssetsDetails">
        <link:definition>240724055 - Disclosure - Prepaids and Other Current Assets Prepaid Expenses and Other Current Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesanOtherLongtermLiabilities" roleURI="http://www.icumed.com/role/AccruedLiabilitiesanOtherLongtermLiabilities">
        <link:definition>210731010 - Disclosure - Accrued Liabilities an Other Long-term Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesanOtherLongtermLiabilitiesTables" roleURI="http://www.icumed.com/role/AccruedLiabilitiesanOtherLongtermLiabilitiesTables">
        <link:definition>230743010 - Disclosure - Accrued Liabilities an Other Long-term Liabilities (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesanOtherLongtermLiabilitiesDetails" roleURI="http://www.icumed.com/role/AccruedLiabilitiesanOtherLongtermLiabilitiesDetails">
        <link:definition>240754056 - Disclosure - Accrued Liabilities an Other Long-term Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AccruedLiabilitiesanOtherLongtermLiabilitiesOtherLongtermLiabilitiesDetails" roleURI="http://www.icumed.com/role/AccruedLiabilitiesanOtherLongtermLiabilitiesOtherLongtermLiabilitiesDetails">
        <link:definition>240764057 - Disclosure - Accrued Liabilities an Other Long-term Liabilities Other Long-term Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermObligationsNotes" roleURI="http://www.icumed.com/role/LongTermObligationsNotes">
        <link:definition>210771011 - Disclosure - Long-Term Obligations (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermObligationsTables" roleURI="http://www.icumed.com/role/LongTermObligationsTables">
        <link:definition>230783011 - Disclosure - Long-Term Obligations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermObligationsDetails" roleURI="http://www.icumed.com/role/LongTermObligationsDetails">
        <link:definition>240794058 - Disclosure - Long-Term Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="LongTermObligationsLineofCreditPricingDetails" roleURI="http://www.icumed.com/role/LongTermObligationsLineofCreditPricingDetails">
        <link:definition>240804059 - Disclosure - Long-Term Obligations Line of Credit Pricing (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.icumed.com/role/IncomeTaxes">
        <link:definition>210811012 - Disclosure - Income Taxes:</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncometaxdisclosureTables" roleURI="http://www.icumed.com/role/IncomeTaxesIncometaxdisclosureTables">
        <link:definition>230823012 - Disclosure - Income Taxes Income tax disclosure (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesIncomeLossfromContinuingOperationsDetails" roleURI="http://www.icumed.com/role/IncomeTaxesIncomeLossfromContinuingOperationsDetails">
        <link:definition>240834060 - Disclosure - Income Taxes Income (Loss) from Continuing Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTaxProvisionDetails" roleURI="http://www.icumed.com/role/IncomeTaxesTaxProvisionDetails">
        <link:definition>240844061 - Disclosure - Income Taxes Tax Provision (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesChangeintaxespayableDetails" roleURI="http://www.icumed.com/role/IncomeTaxesChangeintaxespayableDetails">
        <link:definition>240854062 - Disclosure - Income Taxes Change in taxes payable (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesEffectivetaxrateDetails" roleURI="http://www.icumed.com/role/IncomeTaxesEffectivetaxrateDetails">
        <link:definition>240864063 - Disclosure - Income Taxes Effective tax rate (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesDeferredincometaxassetsliabilitiesDetails" roleURI="http://www.icumed.com/role/IncomeTaxesDeferredincometaxassetsliabilitiesDetails">
        <link:definition>240874064 - Disclosure - Income Taxes Deferred income tax assets (liabilities) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesOperatingLossCarryforwardsDetails" roleURI="http://www.icumed.com/role/IncomeTaxesOperatingLossCarryforwardsDetails">
        <link:definition>240884065 - Disclosure - Income Taxes Operating Loss Carryforwards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTaxCarryforwardsDetails" roleURI="http://www.icumed.com/role/IncomeTaxesTaxCarryforwardsDetails">
        <link:definition>240894066 - Disclosure - Income Taxes Tax Carryforwards (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesTaxHolidayDetails" roleURI="http://www.icumed.com/role/IncomeTaxesTaxHolidayDetails">
        <link:definition>240904067 - Disclosure - Income Taxes Tax Holiday (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUndistributedforeignearningsDetails" roleURI="http://www.icumed.com/role/IncomeTaxesUndistributedforeignearningsDetails">
        <link:definition>240914068 - Disclosure - Income Taxes Undistributed foreign earnings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesUnrecognizedtaxbenefitsDetails" roleURI="http://www.icumed.com/role/IncomeTaxesUnrecognizedtaxbenefitsDetails">
        <link:definition>240924069 - Disclosure - Income Taxes Unrecognized tax benefits (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeographicInformationandSignificantCustomersGeographicInformationandSignificantCustomersNotes" roleURI="http://www.icumed.com/role/GeographicInformationandSignificantCustomersGeographicInformationandSignificantCustomersNotes">
        <link:definition>210931013 - Disclosure - Geographic Information and Significant Customers Geographic Information and Significant Customers (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeographicInformationandSignificantCustomersGeographicInformationTables" roleURI="http://www.icumed.com/role/GeographicInformationandSignificantCustomersGeographicInformationTables">
        <link:definition>230943013 - Disclosure - Geographic Information and Significant Customers Geographic Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GeographicInformationandSignificantCustomersLongLivedAssetsbyGeographicLocationDetails" roleURI="http://www.icumed.com/role/GeographicInformationandSignificantCustomersLongLivedAssetsbyGeographicLocationDetails">
        <link:definition>240954070 - Disclosure - Geographic Information and Significant Customers Long Lived Assets by Geographic Location (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://www.icumed.com/role/StockholdersEquity">
        <link:definition>210961014 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityTables" roleURI="http://www.icumed.com/role/StockholdersEquityTables">
        <link:definition>230973014 - Disclosure - Stockholders' Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityDetails" roleURI="http://www.icumed.com/role/StockholdersEquityDetails">
        <link:definition>240984071 - Disclosure - Stockholders' Equity (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails" roleURI="http://www.icumed.com/role/StockholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails">
        <link:definition>240994072 - Disclosure - Stockholders' Equity Accumulated Other Comprehensive Income (Loss) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.icumed.com/role/CommitmentsandContingencies">
        <link:definition>211001015 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://www.icumed.com/role/CommitmentsandContingenciesTables">
        <link:definition>231013015 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesContingenciesDetails" roleURI="http://www.icumed.com/role/CommitmentsandContingenciesContingenciesDetails">
        <link:definition>241024073 - Disclosure - Commitments and Contingencies Contingencies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CollaborativeandOtherArrangementsNotes" roleURI="http://www.icumed.com/role/CollaborativeandOtherArrangementsNotes">
        <link:definition>211031016 - Disclosure - Collaborative and Other Arrangements (Notes)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CollaborativeandOtherArrangementsTables" roleURI="http://www.icumed.com/role/CollaborativeandOtherArrangementsTables">
        <link:definition>231043016 - Disclosure - Collaborative and Other Arrangements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CollaborativeandOtherArrangementsDetails" roleURI="http://www.icumed.com/role/CollaborativeandOtherArrangementsDetails">
        <link:definition>241054074 - Disclosure - Collaborative and Other Arrangements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.icumed.com/role/SubsequentEvents">
        <link:definition>211061017 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsTables" roleURI="http://www.icumed.com/role/SubsequentEventsTables">
        <link:definition>231073017 - Disclosure - Subsequent Events (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.icumed.com/role/SubsequentEventsDetails">
        <link:definition>241084075 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsCreditAgreementDetails" roleURI="http://www.icumed.com/role/SubsequentEventsCreditAgreementDetails">
        <link:definition>241094076 - Disclosure - Subsequent Events Credit Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsTermLoanACreditLineApplicableMarginDetails" roleURI="http://www.icumed.com/role/SubsequentEventsTermLoanACreditLineApplicableMarginDetails">
        <link:definition>241104077 - Disclosure - Subsequent Events Term Loan A &amp; Credit Line Applicable Margin (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsTermLoanBApplicableMarginDetails" roleURI="http://www.icumed.com/role/SubsequentEventsTermLoanBApplicableMarginDetails">
        <link:definition>241114078 - Disclosure - Subsequent Events Term Loan B Applicable Margin (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SECScheduleArticle1209ValuationandQualifyingAccounts" roleURI="http://www.icumed.com/role/SECScheduleArticle1209ValuationandQualifyingAccounts">
        <link:definition>211121018 - Disclosure - SEC Schedule, Article 12-09, Valuation and Qualifying Accounts</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SECScheduleArticle1209ValuationandQualifyingAccountsDetails" roleURI="http://www.icumed.com/role/SECScheduleArticle1209ValuationandQualifyingAccountsDetails">
        <link:definition>241134079 - Disclosure - SEC Schedule, Article 12-09, Valuation and Qualifying Accounts (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="icui_LineofCreditAccordion" abstract="false" name="LineofCreditAccordion" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Supplychainrestructuringcosts" abstract="false" name="Supplychainrestructuringcosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_LongTermDebtDisclosureAbstract" abstract="true" name="LongTermDebtDisclosureAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_TermLoanAMember" abstract="true" name="TermLoanAMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanAAndCreditLineApplicableMarginSpreadAxis" abstract="true" name="TermLoanAAndCreditLineApplicableMarginSpreadAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="icui_EffectiveIncomeTaxRateReconciliationIPMigration" abstract="false" name="EffectiveIncomeTaxRateReconciliationIPMigration" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ForeignInfusionSystemSupplierMember" abstract="true" name="ForeignInfusionSystemSupplierMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TotalAcquisitionsMember" abstract="true" name="TotalAcquisitionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanBQuarterlyPaymentsAsAOfOriginalDebtAmount" abstract="false" name="TermLoanBQuarterlyPaymentsAsAOfOriginalDebtAmount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_GILTItaxexpensepercent" abstract="false" name="GILTItaxexpensepercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_UnitedStatespropertyandequipmentMember" abstract="true" name="UnitedStatespropertyandequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_InfusionSystemsMember" abstract="true" name="InfusionSystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_IndirectTaxBenefitFromStockOptions" abstract="false" name="IndirectTaxBenefitFromStockOptions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_StockIncentivePlansLineItems" abstract="true" name="StockIncentivePlansLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_EquipmentrevenueMember" abstract="true" name="EquipmentrevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_EffectiveIncomeTaxRateReconciliationContingentConsideration" abstract="false" name="EffectiveIncomeTaxRateReconciliationContingentConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_RevenueGrossProfitVolatilityMember" abstract="true" name="RevenueGrossProfitVolatilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_NonCurrentDeferredTaxAssetGrossTotalMember" abstract="true" name="NonCurrentDeferredTaxAssetGrossTotalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Hedge2Member" abstract="true" name="Hedge2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_ContractassetandliabilitybalancesTable" abstract="true" name="ContractassetandliabilitybalancesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="icui_IncreaseDecreaseinincometaxesincludingexcesstaxbenefitsanddeferredincometaxes" abstract="false" name="IncreaseDecreaseinincometaxesincludingexcesstaxbenefitsanddeferredincometaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_TermLoanAAndCreditLineSpread" abstract="false" name="TermLoanAAndCreditLineSpread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Effectiveincometaxreconciliationnondeductiblecompensation" abstract="false" name="Effectiveincometaxreconciliationnondeductiblecompensation" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_OtherLATAMMember" abstract="true" name="OtherLATAMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_LineOfCreditSpread" abstract="false" name="LineOfCreditSpread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_TermLoanAPaymentYear3And4AsAOfOriginalDebtAmount" abstract="false" name="TermLoanAPaymentYear3And4AsAOfOriginalDebtAmount" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Hedge5Member" abstract="true" name="Hedge5Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_COntractLiabilityRollforwardRollForward" abstract="true" name="COntractLiabilityRollforwardRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_OwnershipShareMinimumRequirement" abstract="false" name="OwnershipShareMinimumRequirement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_SpareParts" abstract="false" name="SpareParts" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_CollaborativeandOtherArrangementsAbstract" abstract="true" name="CollaborativeandOtherArrangementsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_Changeinunitsduetoperformanceexpectations" abstract="false" name="Changeinunitsduetoperformanceexpectations" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_ModifiedPRSUIncrementalExpense" abstract="false" name="ModifiedPRSUIncrementalExpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_StrategicTransactionandIntegration" abstract="false" name="StrategicTransactionandIntegration" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Noncurrentdeferredtaxassetaccruedrestructuring" abstract="false" name="Noncurrentdeferredtaxassetaccruedrestructuring" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_SupplementalCashFlowInformationLeasesTableTextBlock" abstract="false" name="SupplementalCashFlowInformationLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_OtherLongtermLiabilitiesAbstract" abstract="true" name="OtherLongtermLiabilitiesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_SmithsMedicalMember" abstract="true" name="SmithsMedicalMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncomePercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Sparepartsusage" abstract="false" name="Sparepartsusage" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_NetCashPaidReceivedforcurrentandprioracquisitions" abstract="false" name="NetCashPaidReceivedforcurrentandprioracquisitions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncome" abstract="false" name="EffectiveIncomeTaxRateReconciliationForeignDerivedIntangibleIncome" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_SupplementalBalanceSheetInformationLeasesTableTextBlock" abstract="false" name="SupplementalBalanceSheetInformationLeasesTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_GILTItaxexpense" abstract="false" name="GILTItaxexpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_BusinessCombinationConsiderationCashHoldback" abstract="false" name="BusinessCombinationConsiderationCashHoldback" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ESPPOriginalIssuance" abstract="false" name="ESPPOriginalIssuance" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_Cleanupcosts" abstract="false" name="Cleanupcosts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_InternationalSalesDomain" abstract="true" name="InternationalSalesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Deferredtaxcharge" abstract="false" name="Deferredtaxcharge" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_PursuitVascularInc.Member" abstract="true" name="PursuitVascularInc.Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanBApplicableMarginAxis" abstract="true" name="TermLoanBApplicableMarginAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="icui_Paymenttoacquirebusinessnetofworkingcapitaladjustments" abstract="false" name="Paymenttoacquirebusinessnetofworkingcapitaladjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ProvisionForWarrantyAndReturns" abstract="false" name="ProvisionForWarrantyAndReturns" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_A2003PlanMember" abstract="true" name="A2003PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_NoncurrentDeferredTaxLiabilityForeign" abstract="false" name="NoncurrentDeferredTaxLiabilityForeign" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_IVSolutionsMember" abstract="true" name="IVSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_LIBORBasisSpreadonVariableRate" abstract="false" name="LIBORBasisSpreadonVariableRate" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_OperatinglosscarryforwardsAbstract" abstract="true" name="OperatinglosscarryforwardsAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_PricingLevelIIIMemberMember" abstract="true" name="PricingLevelIIIMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_LongTermContingentConsiderationGross" abstract="false" name="LongTermContingentConsiderationGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ScheduleofstockcompensationandrelatedtaxbenefitsTableTextBlock" abstract="false" name="ScheduleofstockcompensationandrelatedtaxbenefitsTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_MexicoPropertyAndEquipmentMember" abstract="true" name="MexicoPropertyAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_ForeignMember" abstract="true" name="ForeignMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Deferredtaxliabilitychangeinaccountingmethod" abstract="false" name="Deferredtaxliabilitychangeinaccountingmethod" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_PerformanceRestrictedStockUnitsPRSUsMember" abstract="true" name="PerformanceRestrictedStockUnitsPRSUsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Contractsettlements" abstract="false" name="Contractsettlements" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Spread" abstract="false" name="Spread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_ShareawarddataAbstract" abstract="true" name="ShareawarddataAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_Accruedfreight" abstract="false" name="Accruedfreight" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ComputerEquipmentAndSoftwareMember" abstract="true" name="ComputerEquipmentAndSoftwareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Hedge4Member" abstract="true" name="Hedge4Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_InformationbyGeographicAreaandCustomerConcentrationTextBlock" abstract="false" name="InformationbyGeographicAreaandCustomerConcentrationTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_EarnoutliabilityMember" abstract="true" name="EarnoutliabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanBEuroRateLoanSpread" abstract="false" name="TermLoanBEuroRateLoanSpread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_TermLoanAPaymentFirstYearsAsAOfOriginalDebt" abstract="false" name="TermLoanAPaymentFirstYearsAsAOfOriginalDebt" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_CommonStockSharesMember" abstract="true" name="CommonStockSharesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_WarrantyAndReturnReserveInventory" abstract="false" name="WarrantyAndReturnReserveInventory" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_RestructuringAdjustmentsSeveranceAndFacility" abstract="false" name="RestructuringAdjustmentsSeveranceAndFacility" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_WarrantyAndReturnReserveInventoryChargedToOtherAccounts" abstract="false" name="WarrantyAndReturnReserveInventoryChargedToOtherAccounts" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_PricingLevelIIMemberMember" abstract="true" name="PricingLevelIIMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Accruedsalestaxes" abstract="false" name="Accruedsalestaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_A2011PlanMember" abstract="true" name="A2011PlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_DeferredtaxassetsandliabilitiesTable" abstract="true" name="DeferredtaxassetsandliabilitiesTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="icui_StockIncentivePlansTable" abstract="true" name="StockIncentivePlansTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="icui_Noncurrentdeferredtaxassetacquiredfuturetaxdeductions" abstract="false" name="Noncurrentdeferredtaxassetacquiredfuturetaxdeductions" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_TermLoanAAndCreditLineApplicableMarginSpreadDomain" abstract="true" name="TermLoanAAndCreditLineApplicableMarginSpreadDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Prepaidinsuranceandpropertytaxes" abstract="false" name="Prepaidinsuranceandpropertytaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_SharesAvailableInEmployeeStockPurchasePlan" abstract="false" name="SharesAvailableInEmployeeStockPurchasePlan" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_Sharestransferredfromsupersededplan" abstract="false" name="Sharestransferredfromsupersededplan" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_Accruedlegalfees" abstract="false" name="Accruedlegalfees" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_CriticalCareMember" abstract="true" name="CriticalCareMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanBInitialSpread" abstract="false" name="TermLoanBInitialSpread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_TermLoanBBaseRateLoanSpread" abstract="false" name="TermLoanBBaseRateLoanSpread" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_OtherforeigncountriesMember" abstract="true" name="OtherforeigncountriesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_UsGaap_InterestRateSwap2Member" abstract="true" name="UsGaap_InterestRateSwap2Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TermLoanAPaymentYear5" abstract="false" name="TermLoanAPaymentYear5" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Operatingleaserightofuseassetamortization" abstract="false" name="Operatingleaserightofuseassetamortization" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_TermLoanBApplicableMarginDomain" abstract="true" name="TermLoanBApplicableMarginDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Effectivetaxratereconciliationnondeductiblecomppercent" abstract="false" name="Effectivetaxratereconciliationnondeductiblecomppercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Grantdatefairvalueofrestrictedstockunitsgranted" abstract="false" name="Grantdatefairvalueofrestrictedstockunitsgranted" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Noncurrentdeferredtaxassetchargebacksdiscountscustomerconcessions" abstract="false" name="Noncurrentdeferredtaxassetchargebacksdiscountscustomerconcessions" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_DeferredtaxassetsandliabilitiesLineItems" abstract="true" name="DeferredtaxassetsandliabilitiesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_NoncurrentDeferredTaxLiabilityStateIncomeTaxes" abstract="false" name="NoncurrentDeferredTaxLiabilityStateIncomeTaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_LongtermInvestmentsDomain" abstract="true" name="LongtermInvestmentsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_UnrecognizedTaxBenefitsRollForwardRollForward" abstract="true" name="UnrecognizedTaxBenefitsRollForwardRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_Hedge3MemberMember" abstract="true" name="Hedge3MemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_ShortTermContingentConsiderationGross" abstract="false" name="ShortTermContingentConsiderationGross" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_PursuitVascularLLCMember" abstract="true" name="PursuitVascularLLCMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_MoldsMember" abstract="true" name="MoldsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_SoftwarerevenueMember" abstract="true" name="SoftwarerevenueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_TimebasedstockoptionMember" abstract="true" name="TimebasedstockoptionMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_ESPPAnnualIssuanceIncreaseLimit" abstract="false" name="ESPPAnnualIssuanceIncreaseLimit" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_DerivativeInterestRateFloor" abstract="false" name="DerivativeInterestRateFloor" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Optiontoextendinyears" abstract="false" name="Optiontoextendinyears" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="icui_Hedge1Member" abstract="true" name="Hedge1Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_FurniturefixturesandmoldsMember" abstract="true" name="FurniturefixturesandmoldsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_WarrantyAndReturnReserveCosts" abstract="false" name="WarrantyAndReturnReserveCosts" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_InfusionConsumablesMember" abstract="true" name="InfusionConsumablesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_WarrantyAndReturnReserveInventoryWriteOffs" abstract="false" name="WarrantyAndReturnReserveInventoryWriteOffs" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_EffectiveIncomeTaxRateReconciliationContingentConsiderationPercent" abstract="false" name="EffectiveIncomeTaxRateReconciliationContingentConsiderationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_InternationalDistributorMember" abstract="true" name="InternationalDistributorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_InterestMarginandCommitmentFeeTableTextBlock" abstract="false" name="InterestMarginandCommitmentFeeTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_PricingLevel5Member" abstract="true" name="PricingLevel5Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Restructuringandstrategictransactionexpense" abstract="false" name="Restructuringandstrategictransactionexpense" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_NoncurrentDeferredTaxAssetTaxCreditsState" abstract="false" name="NoncurrentDeferredTaxAssetTaxCreditsState" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_HospiraMember" abstract="true" name="HospiraMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Contingentconsiderationgross" abstract="false" name="Contingentconsiderationgross" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Accruedothertaxes" abstract="false" name="Accruedothertaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_UpFrontMaintenanceFee" abstract="false" name="UpFrontMaintenanceFee" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_Grantdatefairvalueperformancerestrictedstockunits" abstract="false" name="Grantdatefairvalueperformancerestrictedstockunits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_TermLoanBMember" abstract="true" name="TermLoanBMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Percentoftotalrevenue" abstract="false" name="Percentoftotalrevenue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Outsidesalescommissions" abstract="false" name="Outsidesalescommissions" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_EffectiveTaxRateReconciliationIPMigrationPercent" abstract="false" name="EffectiveTaxRateReconciliationIPMigrationPercent" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="icui_TermLoansLineOfCreditMember" abstract="true" name="TermLoansLineOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Prepaidothertaxes" abstract="false" name="Prepaidothertaxes" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_NoncurrentDeferredTaxLiabilityMember" abstract="true" name="NoncurrentDeferredTaxLiabilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_Percentageofrevenue" abstract="false" name="Percentageofrevenue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:percentItemType"/>
  <xs:element id="icui_Timebasedoptionsgrantdatefairvalue" abstract="false" name="Timebasedoptionsgrantdatefairvalue" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ItalyPropertyAndEquipmentMember" abstract="true" name="ItalyPropertyAndEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_RestrictedStockAndPerformanceRestrictedStockUnitsMember" abstract="true" name="RestrictedStockAndPerformanceRestrictedStockUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_LesseeOperatingAndFinanceLeaseTextBlock" abstract="false" name="LesseeOperatingAndFinanceLeaseTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_Liabilitiesforcontracts" abstract="false" name="Liabilitiesforcontracts" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ForeignDistibutorMember" abstract="true" name="ForeignDistibutorMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_AccruedSalariesAndBenefits" abstract="false" name="AccruedSalariesAndBenefits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_InstrumentsPlacedwithCustomersMember" abstract="true" name="InstrumentsPlacedwithCustomersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_ExercisedOptionsDataTableTextBlock" abstract="false" name="ExercisedOptionsDataTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:textBlockItemType"/>
  <xs:element id="icui_IncomeTaxDisclosuredeferredtaxesAbstract" abstract="true" name="IncomeTaxDisclosuredeferredtaxesAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_PricingLevelIVMemberMember" abstract="true" name="PricingLevelIVMemberMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_PricingLevelIMember" abstract="true" name="PricingLevelIMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="icui_PerformanceSharesEarned" abstract="false" name="PerformanceSharesEarned" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="icui_Noncurrentdeferredtaxasset" abstract="false" name="Noncurrentdeferredtaxasset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="icui_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceExpectationAdditionsIntrinsicValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsPerformanceExpectationAdditionsIntrinsicValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:perShareItemType"/>
  <xs:element id="icui_ContractassetandliabilitybalancesLineItems" abstract="true" name="ContractassetandliabilitybalancesLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="icui_NoncurrentDeferredTaxLiabilityDepreciationAndAmortization" abstract="false" name="NoncurrentDeferredTaxLiabilityDepreciationAndAmortization" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
