<Observation xmlns="http://hl7.org/fhir">
  <meta>
    <lastUpdated value="2017-08-24T15:51:23+00:00" />
  </meta>
  <text>
    <status value="additional" />
    <div xmlns="http://www.w3.org/1999/xhtml">
      <p>%Some xhtml content%</p>
    </div>
  </text>
  <extension url="[base-structure]/ca-on-lab-ext-obs-sub-id">
    <valueString value="1" />
  </extension>
  <extension url="[base-structure]/ca-on-lab-ext-obs-sort-key">
    <valueString value="3" />
  </extension>
  <extension url="[base-structure]/ca-on-lab-ext-note">
    <extension url="sorce">
      <valueCoding>
        <system value="http://hl7.org/fhir/v2/0105" />
        <code value="P" />
        <display value="Order" />
      </valueCoding>
    </extension>
    <extension url="annotation">
      <valueAnnotation>
        <authorString value="[id-system-global-base]/ca-on-lab-license:4008" />
        <text value="Example of procedure request note" />
      </valueAnnotation>
    </extension>
  </extension>
  <identifier>
    <system value="[id-system-local-base]/lab/filler-id-lab-license-4004" />
    <value value="23423432" />
    <assigner>
      <reference value="#Org1" />
    </assigner>
  </identifier>
  <basedOn>
    <reference value="ProcedureRequest#1" />
  </basedOn>
  <status value="registered" />
  <code>
    <coding>
      <system value="http://loinc.org/" />
      <code value="39792-7" />
      <display value="Sodium:SCnc:Pt:BldC:Qn" />
    </coding>
  </code>
  <subject>
    <reference value="Pat#1" />
  </subject>
  <effectiveDateTime value="2017-08-24T11:51:24-04:00" />
  <issued value="2017-08-24T11:51:24-04:00" />
  <performer>
    <reference value="Org#1" />
  </performer>
  <valueQuantity>
    <value value="205" />
  </valueQuantity>
  <interpretation>
    <coding>
      <system value="http://hl7.org/fhir/v2/0078" />
      <code value="AA" />
      <display value="Critical abnormal" />
    </coding>
  </interpretation>
  <method>
    <text value="PCR" />
  </method>
  <specimen>
    <reference value="Specimen#1" />
  </specimen>
  <referenceRange>
    <low>
      <value value="135" />
      <unit value="mmol" />
    </low>
    <high>
      <value value="145" />
      <unit value="mmol" />
    </high>
    <appliesTo>
      <coding>
        <system value="http://hl7.org/fhir/v2/0080" />
        <code value="R" />
        <display value="Race" />
      </coding>
    </appliesTo>
  </referenceRange>
</Observation>