<Observation xmlns="http://hl7.org/fhir">
  <meta>
    <profile value="http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-profile-Observation|2.0.0" />
  </meta>
  <extension url="http://ehealthontario.ca/fhir/StructureDefinition/ca-on-lab-ext-sort-key">
    <valueString value="3" />
  </extension>
  <identifier>
    <system value="http://ehealthontario.ca/fhir/NamingSystem/lab/filler-id-lab-license-4004" />
    <value value="23423432" />
    <assigner>
      <reference value="#Org1" />
    </assigner>
  </identifier>
  <basedOn>
    <reference value="#ServiceRequest-1" />
  </basedOn>
  <status value="final" />
  <category>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/observation-category" />
      <code value="laboratory" />
    </coding>
  </category>
  <code>
    <coding>
      <system value="http://loinc.org/" />
      <code value="39792-7" />
      <display value="Sodium:SCnc:Pt:BldC:Qn" />
    </coding>
  </code>
  <subject>
    <reference value="#Pat1" />
  </subject>
  <effectiveDateTime value="2017-08-24T11:51:24-04:00" />
  <issued value="2017-08-24T11:51:24-04:00" />
  <performer>
    <reference value="#Org1" />
  </performer>
  <valueQuantity>
    <value value="205" />
    <unit value="mmol/L" />
  </valueQuantity>
  <interpretation>
    <coding>
      <system value="http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation" />
      <code value="HH" />
      <display value="Critical High" />
    </coding>
  </interpretation>
  <note>
    <text value="Some notes about the observation" />
  </note>
  <method>
    <text value="PCR" />
  </method>
  <specimen>
    <reference value="Specimen#1" />
  </specimen>
  <referenceRange>
    <low>
      <value value="135" />
      <unit value="mmol/L" />
    </low>
    <high>
      <value value="145" />
      <unit value="mmol/L" />
    </high>
    <appliesTo>
      <coding>
        <system value="http://terminology.hl7.org/CodeSystem/v2-0080" />
        <code value="R" />
        <display value="Race" />
      </coding>
    </appliesTo>
  </referenceRange>
</Observation>