<Observation xmlns="http://hl7.org/fhir">
  <id value="a8c25c28-2dae-4183-8ef6-653ae6120601" />
  <meta>
    <versionId value="1" />
    <lastUpdated value="2016-12-16T14:32:58.923+00:00" />
  </meta>
  <text>
    <status value="generated" />
    <div xmlns="http://www.w3.org/1999/xhtml">2005-07-04: pH Bld = 7.22 [pH]</div>
  </text>
  <status value="final" />
  <category>
    <coding>
      <system value="http://hl7.org/fhir/observation-category" />
      <code value="laboratory" />
      <display value="Laboratory" />
    </coding>
    <text value="Laboratory" />
  </category>
  <code>
    <coding>
      <system value="http://loinc.org/" />
      <code value="11558-4" />
      <display value="pH Bld" />
    </coding>
    <text value="pH Bld" />
  </code>
  <subject>
    <reference value="Patient/1134281" />
  </subject>
  <effectiveDateTime value="2005-07-04" />
  <valueQuantity>
    <value value="7.22" />
    <unit value="[pH]" />
    <system value="http://unitsofmeasure.org/" />
  </valueQuantity>
  <referenceRange>
    <low>
      <value value="7.35" />
      <unit value="[pH]" />
      <system value="http://unitsofmeasure.org/" />
      <code value="[pH]" />
    </low>
    <high>
      <value value="7.45" />
      <unit value="[pH]" />
      <system value="http://unitsofmeasure.org/" />
      <code value="[pH]" />
    </high>
    <meaning>
      <coding>
        <system value="http://hl7.org/fhir/referencerange-meaning" />
        <code value="normal" />
        <display value="Normal Range" />
      </coding>
      <text value="Normal Range" />
    </meaning>
  </referenceRange>
</Observation>