<StructureDefinition xmlns="http://hl7.org/fhir">
  <id value="ie-core-pulse-oximetry" />
  <url value="https://hl7-ie.github.io/ie-core/fhir/ie/core/StructureDefinition/ie-core-pulse-oximetry" />
  <name value="IECorePulseOximetry" />
  <title value="IE Core Pulse Oximetry" />
  <status value="draft" />
  <description value="Records pulse oximetry (SpO2) observations with optional flow rate and concentration components in the Irish healthcare context." />
  <fhirVersion value="4.0.1" />
  <kind value="resource" />
  <abstract value="false" />
  <type value="Observation" />
  <baseDefinition value="https://hl7-ie.github.io/ie-core/fhir/ie/core/StructureDefinition/ie-core-vital-signs" />
  <derivation value="constraint" />
  <differential>
    <element id="Observation.code">
      <path value="Observation.code" />
      <patternCodeableConcept>
        <coding>
          <system value="http://loinc.org" />
          <code value="59408-5" />
          <display value="Oxygen saturation in Arterial blood by Pulse oximetry" />
        </coding>
      </patternCodeableConcept>
    </element>
    <element id="Observation.value[x]">
      <path value="Observation.value[x]" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.value[x].value">
      <path value="Observation.value[x].value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x].unit">
      <path value="Observation.value[x].unit" />
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      <mustSupport value="true" />
    </element>
    <element id="Observation.value[x].system">
      <path value="Observation.value[x].system" />
      <min value="1" />
      <patternUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.value[x].code">
      <path value="Observation.value[x].code" />
      <min value="1" />
      <patternCode value="%" />
    </element>
    <element id="Observation.component">
      <path value="Observation.component" />
      <slicing>
        <discriminator>
          <type value="pattern" />
          <path value="code" />
        </discriminator>
        <rules value="open" />
      </slicing>
    </element>
    <element id="Observation.component:flowRate">
      <path value="Observation.component" />
      <sliceName value="flowRate" />
      <min value="0" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.component:flowRate.code">
      <path value="Observation.component.code" />
      <patternCodeableConcept>
        <coding>
          <system value="http://loinc.org" />
          <code value="3151-8" />
          <display value="Inhaled oxygen flow rate" />
        </coding>
      </patternCodeableConcept>
    </element>
    <element id="Observation.component:flowRate.value[x]">
      <path value="Observation.component.value[x]" />
      <type>
        <code value="Quantity" />
      </type>
    </element>
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      <mustSupport value="true" />
    </element>
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      <min value="1" />
      <mustSupport value="true" />
    </element>
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      <path value="Observation.component.value[x].system" />
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      <patternUri value="http://unitsofmeasure.org" />
    </element>
    <element id="Observation.component:flowRate.value[x].code">
      <path value="Observation.component.value[x].code" />
      <min value="1" />
      <patternCode value="L/min" />
    </element>
    <element id="Observation.component:concentration">
      <path value="Observation.component" />
      <sliceName value="concentration" />
      <min value="0" />
      <max value="1" />
      <mustSupport value="true" />
    </element>
    <element id="Observation.component:concentration.code">
      <path value="Observation.component.code" />
      <patternCodeableConcept>
        <coding>
          <system value="http://loinc.org" />
          <code value="3150-0" />
          <display value="Inhaled oxygen concentration" />
        </coding>
      </patternCodeableConcept>
    </element>
    <element id="Observation.component:concentration.value[x]">
      <path value="Observation.component.value[x]" />
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        <code value="Quantity" />
      </type>
    </element>
    <element id="Observation.component:concentration.value[x].value">
      <path value="Observation.component.value[x].value" />
      <min value="1" />
      <mustSupport value="true" />
    </element>
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      <mustSupport value="true" />
    </element>
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      <patternCode value="%" />
    </element>
  </differential>
</StructureDefinition>