Personal Health Device Implementation Guide
1.0.0 - STU 1

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## : Example of a NaN case - XML Representation

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    <Observation xmlns="http://hl7.org/fhir">
      <id value="nan-1.0.0.42"/>
      <meta>
        <profile
                 value="http://hl7.org/fhir/uv/phd/StructureDefinition/PhdNumericObservation"/>
      </meta>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p><b>Generated Narrative</b></p><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">Resource "nan-1.0.0.42" </p><p style="margin-bottom: 0px">Profile: <a href="StructureDefinition-PhdNumericObservation.html">PhdNumericObservation</a></p></div><p><b>Gateway Device</b>: <a href="Device-phg-ecde3d4e58532d31.000000000000.html">Device/phg-ecde3d4e58532d31.000000000000</a></p><p><b>status</b>: final</p><p><b>code</b>: MDC_SAT_O2_QUAL: Pulsatile quality <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/3.1.0/CodeSystem-v3-mdc.html">ISO 11073-10101 Health informatics - Point-of-care</a>#150320)</span></p><p><b>subject</b>: <a href="Patient-sisansarahId.1.2.3.4.5.6.7.8.10.html">Patient/sisansarahId.1.2.3.4.5.6.7.8.10</a> " PIGGY"</p><p><b>effective</b>: 2018-11-11 07:07:48-0500</p><p><b>dataAbsentReason</b>: not-a-number (Not a number) <span style="background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki"> (<a href="http://terminology.hl7.org/3.1.0/CodeSystem-data-absent-reason.html">DataAbsentReason</a>#not-a-number)</span></p><p><b>device</b>: <a href="Device-phd-74E8FFFEFF051C00.001C05FFE874.html">Device/phd-74E8FFFEFF051C00.001C05FFE874</a></p></div>
      </text>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/observation-gatewayDevice">
        <valueReference>
          <reference value="Device/phg-ecde3d4e58532d31.000000000000"/>
        </valueReference>
      </extension>
      <status value="final"/>
      <code>
        <coding>
          <system value="urn:iso:std:iso:11073:10101"/>
          <code value="150320"/>
        </coding>
        <text value="MDC_SAT_O2_QUAL: Pulsatile quality"/>
      </code>
      <subject>
        <reference value="Patient/sisansarahId.1.2.3.4.5.6.7.8.10"/>
      </subject>
      <effectiveDateTime value="2018-11-11T19:07:48-05:00"/>
      <dataAbsentReason>
        <coding>
          <system value="http://terminology.hl7.org/CodeSystem/data-absent-reason"/>
          <code value="not-a-number"/>
        </coding>
        <text value="not-a-number (Not a number)"/>
      </dataAbsentReason>
      <device>
        <reference value="Device/phd-74E8FFFEFF051C00.001C05FFE874"/>
      </device>
    </Observation>