AU Base Implementation Guide
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## : Observation - Measurement of Hepatitis B surface antibody - XML Representation

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    <Observation xmlns="http://hl7.org/fhir">
      <id value="specimen-hepatitis-b-serology"/>
      <meta>
        <profile
                 value="http://hl7.org.au/fhir/StructureDefinition/au-pathologyresult"/>
      </meta>
      <text>
        <status value="generated"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: Observation specimen-hepatitis-b-serology</b></p><a name="specimen-hepatitis-b-serology"> </a><a name="hcspecimen-hepatitis-b-serology"> </a><a name="specimen-hepatitis-b-serology-en-AU"> </a><div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px"/><p style="margin-bottom: 0px">Profile: <a href="StructureDefinition-au-pathologyresult.html">AU Base Pathology Result</a></p></div><p><b>basedOn</b>: <a href="ServiceRequest-hepatitis-b-antibody.html">ServiceRequest Hepatitis B surface antibody measurement</a></p><p><b>status</b>: Final</p><p><b>category</b>: <span title="Codes:{http://terminology.hl7.org/CodeSystem/observation-category laboratory}">Laboratory</span>, <span title="Codes:{http://terminology.hl7.org/CodeSystem/v2-0074 SR}">Serology</span></p><p><b>code</b>: <span title="Codes:{http://loinc.org 16935-9}">Hepatitis B surface Ab</span></p><p><b>subject</b>: <a href="Patient-example0.html">Stella Franklin  Female, DoB: 1985-10-14 ( IHI: Austalian Healthcare Identifier - Individual#8003608833357361)</a></p><p><b>effective</b>: 2019-09-25 08:20:00+0000</p><p><b>performer</b>: <a href="Organization-example6.html">Organization ACME Pathology</a></p><p><b>value</b>: &gt;10 IU/L</p><p><b>specimen</b>: <a href="Specimen-serum.html">Specimen: accessionIdentifier = https://acmepathology.example.com/labs/accession-ids#1978881817; type = Serum specimen (specimen)</a></p><h3>ReferenceRanges</h3><table class="grid"><tr><td style="display: none">-</td><td><b>Low</b></td></tr><tr><td style="display: none">*</td><td>10 IU/L</td></tr></table></div>
      </text>
      <basedOn>🔗
        <reference value="ServiceRequest/hepatitis-b-antibody"/>
      </basedOn>
      <status value="final"/>
      <category>
        <coding>
          <system
                  value="http://terminology.hl7.org/CodeSystem/observation-category"/>
          <code value="laboratory"/>
        </coding>
      </category>
      <category>
        <coding>
          <system value="http://terminology.hl7.org/CodeSystem/v2-0074"/>
          <code value="SR"/>
          <display value="Serology"/>
        </coding>
      </category>
      <code>
        <coding>
          <system value="http://loinc.org"/>
          <code value="16935-9"/>
        </coding>
        <text value="Hepatitis B surface Ab"/>
      </code>
      <subject>🔗
        <reference value="Patient/example0"/>
      </subject>
      <effectiveDateTime value="2019-09-25T08:20:00Z"/>
      <performer>🔗
        <reference value="Organization/example6"/>
      </performer>
      <valueQuantity>
        <value value="10"/>
        <comparator value="&gt;"/>
        <unit value="IU/L"/>
      </valueQuantity>
      <specimen>🔗
        <reference value="Specimen/serum"/>
      </specimen>
      <referenceRange>
        <low>
          <value value="10"/>
          <unit value="IU/L"/>
        </low>
      </referenceRange>
    </Observation>