Real-world patient - estimated gfr (id = "f205")

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<Observation xmlns="http://hl7.org/fhir">  <id value="f205"/>   <identifier>     <system value="https://intranet.aumc.nl/labvalues"/>     <!--    Does not exist    -->    <value value="1304-03720-eGFR"/>   </identifier>   <!--    eGFR was measured on April fourth    -->  <status value="final"/>   <code>     <!--    Kind of observation = eGFR    -->    <coding>       <system value="http://loinc.org"/>       <code value="33914-3"/>       <display value="Glomerular filtration rate [Volume Rate/Area] in Serum or Plasma by Creatinine-based

       formula (MDRD)/1.73 sq M"/> 
    </coding>   </code>   <subject>     <reference value="Patient/f201"/>     <display value="Roel"/>   </subject>   <issued value="2013-04-04T14:34:00+01:00"/>   <performer>     <reference value="Practitioner/f202"/>     <display value="Luigi Maas"/>   </performer>   <!--   no value element since have only component values and unable to interpret results

   needs clinical interpretation   -->
  <interpretation>     <text value="interpretation of results should be assigned based upon the level of kindey function"/>   </interpretation>   <note>     <text value="GFR estimating equations developed by the Modification of Diet in Renal Disease

     (MDRD) Study Group and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI)...."/> 
  </note>   <!--    The observation is complete    -->  <!--    No reliability concerns    -->  <method>     <!--    Method was MDRD    -->    <coding>       <system value="http://snomed.info/sct"/>       <code value="702668005"/>       <display value="MDRD"/>     </coding>   </method>   <!--    The MDRD equation does require race (African American or non-African American),

   which also might not be readily available. For this reason, eGFR values for both
   African Americans and non-African Americans are reported. so use component elements
   here   -->
  <component>     <code>       <!--    Kind of observation = eGFR for AA    -->      <coding>         <system value="http://loinc.org"/>         <code value="48643-1"/>         <display value="Glomerular filtration rate [Volume Rate/Area] in Serum, Plasma or Blood by Creatinine-based

         formula (MDRD)/1.73 sq M among black population"/> 
      </coding>     </code>     <valueQuantity>       <!--    eGFR=54mL/min/1.73m2    -->      <value value="60"/>       <comparator value="&gt;"/>       <unit value="mL/min/1.73m2"/>       <system value="http://unitsofmeasure.org"/>       <code value="mL/min/{1.73_m2}"/>     </valueQuantity>     <referenceRange>       <low>         <value value="60"/>         <unit value="mL/min/1.73m2"/>         <system value="http://unitsofmeasure.org"/>         <code value="mL/min/{1.73_m2}"/>       </low>       <appliesTo>         <text value="non-black/african-american"/>       </appliesTo>       <age>         <low>           <value value="18"/>           <unit value="yrs"/>           <system value="http://unitsofmeasure.org"/>           <code value="a"/>         </low>       </age>     </referenceRange>   </component>   <component>     <code>       <!--    Kind of observation = eGFR for non AA    -->      <coding>         <system value="http://loinc.org"/>         <code value="48642-3"/>         <display value="GFR/BSA pr.non blk SerPlBld MDRD-ArV"/>       </coding>     </code>     <valueQuantity>       <!--    eGFR=54mL/min/1.73m2    -->      <value value="60"/>       <unit value="mL/min/1.73m2"/>       <system value="http://unitsofmeasure.org"/>       <code value="mL/min/{1.73_m2}"/>     </valueQuantity>     <referenceRange>       <low>         <value value="60"/>         <unit value="mL/min/1.73m2"/>         <system value="http://unitsofmeasure.org"/>         <code value="mL/min/{1.73_m2}"/>       </low>       <age>         <low>           <value value="18"/>           <unit value="yrs"/>           <system value="http://unitsofmeasure.org"/>           <code value="a"/>         </low>       </age>     </referenceRange>   </component> 


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Observation

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