Clinical assessment tool example - GCS with individual scores as related QuestionnaireAnswer (id = "gcs-qa")

<?xml version="1.0" encoding="UTF-8"?>

<!--   
 This is an example of a Glasgow Coma Score using the .related to bundle the  measurements
  will use contained elements for this example only but coudl just as easily use
 external or bundled elements..  source http://www.choa.org/~/media/CHOA/Documents/Services/Co
ncussion/Concussion-glasgow-coma-scale.pdf
   --><Observation xmlns="http://hl7.org/fhir">
  <id value="gcs-qa"/> 
  <!--    the mandatory quality flags:    -->
  <status value="final"/> 
  <!--   
    Observations are often coded in multiple code systems.
      - LOINC
    - or SNOMED
      -and/or the source system may provides its own "local" code, which may be
   less or more granular than LOINC.
  In this example there is only LOINC
     -->
  <code> 
    <!--    LOINC - always recommended to have a LOINC code    -->
    <coding> 
      <system value="http://loinc.org"/> 
      <code value="9269-2"/> 
      <display value="Glasgow coma score total"/> 
    </coding> 
    <text value="Glasgow Coma Scale , (GCS)"/> 
  </code> 
  <subject> 
    <reference value="Patient/example"/> 
    <display value="Peter James Chalmers"/> 
  </subject> 
  <effectiveDateTime value="2014-12-11T04:44:16Z"/> 
  <!--    In FHIR, units may be represented twice. Once in the
    agreed human representation, and once in a coded form.
    In this example the UCUM unit is provided but no human representation since
   this is often not displayed
      -->
  <valueQuantity> 
    <value value="13"/> 
    <system value="http://unitsofmeasure.org"/> 
    <code value="{score}"/> 
  </valueQuantity> 
  <referenceRange> 
    <high> 
      <value value="8"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="{score}"/> 
    </high> 
    <!--    meaning as text    -->
    <type> 
      <text value="Severe TBI"/> 
    </type> 
  </referenceRange> 
  <referenceRange> 
    <low> 
      <value value="9"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="{score}"/> 
    </low> 
    <high> 
      <value value="12"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="{score}"/> 
    </high> 
    <!--    meaning as text    -->
    <type> 
      <text value="Moderate TBI"/> 
    </type> 
  </referenceRange> 
  <referenceRange> 
    <low> 
      <value value="13"/> 
      <system value="http://unitsofmeasure.org"/> 
      <code value="{score}"/> 
    </low> 
    <!--    meaning as text    -->
    <type> 
      <text value="Mild TBI"/> 
    </type> 
  </referenceRange> 
  <!--    put the references to the QuestionnairAnswer example here using the derived-From
   type     -->
  <derivedFrom> 
    <reference value="QuestionnaireResponse/gcs"/> 
    <display value="GCS form results"/> 
  </derivedFrom> 
</Observation>