Blood Pressure Measurement with an absent Diastolic measurement

{
  "resourceType" : "Observation",
  "id" : "blood-pressure-dar",
  "meta" : {
    "profile" : ["http://hl7.org/fhir/StructureDefinition/vitalsigns"]
  },
  "text" : {
    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><p><b>Generated Narrative: Observation</b><a name=\"blood-pressure-dar\"> </a><a name=\"hcblood-pressure-dar\"> </a></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 Observation &quot;blood-pressure-dar&quot; </p><p style=\"margin-bottom: 0px\">Profile: <a href=\"vitalsigns.html\">Vital Signs Profile</a></p></div><p><b>identifier</b>: <a href=\"http://terminology.hl7.org/5.5.0/NamingSystem-uri.html\" title=\"As defined by RFC 3986 (http://www.ietf.org/rfc/rfc3986.txt)(with many schemes defined in many RFCs). For OIDs and UUIDs, use the URN form (urn:oid:(note: lowercase) and urn:uuid:). See http://www.ietf.org/rfc/rfc3001.txt and http://www.ietf.org/rfc/rfc4122.txt \r\n\r\nThis oid is used as an identifier II.root to indicate the the extension is an absolute URI (technically, an IRI). Typically, this is used for OIDs and GUIDs. Note that when this OID is used with OIDs and GUIDs, the II.extension should start with urn:oid or urn:uuid: \r\n\r\nNote that this OID is created to aid with interconversion between CDA and FHIR - FHIR uses urn:ietf:rfc:3986 as equivalent to this OID. URIs as identifiers appear more commonly in FHIR.\r\n\r\nThis OID may also be used in CD.codeSystem.\">URI</a>/urn:uuid:187e0c12-8dd2-67e2-99b2-bf273c878281</p><p><b>status</b>: final</p><p><b>category</b>: Vital Signs <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/5.5.0/CodeSystem-observation-category.html\">Observation Category Codes</a>#vital-signs)</span></p><p><b>code</b>: Blood pressure systolic &amp; diastolic <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#85354-9 &quot;Blood pressure panel with all children optional&quot;)</span></p><p><b>subject</b>: <a href=\"patient-example.html\">Patient/example</a> &quot;Peter CHALMERS&quot;</p><p><b>effective</b>: 2012-09-17</p><p><b>performer</b>: <a href=\"practitioner-example.html\">Practitioner/example</a> &quot;Adam CAREFUL&quot;</p><p><b>interpretation</b>: <span title=\"    an interpretation offered to the combination observation\n        generally, it would only be appropriate to offer an interpretation\n        of an observation that has no value if it has &quot;COMP&quot; (component)\n        observations    \">Below low normal <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/5.5.0/CodeSystem-v3-ObservationInterpretation.html\">ObservationInterpretation</a>#L &quot;low&quot;)</span></span></p><p><b>bodySite</b>: <span title=\" The BodySite can be captured in a LOINC code but am showing it here to demonstrate populating the element  \">Right arm <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#368209003)</span></span></p><blockquote><p><b>component</b></p><p><b>code</b>: <span title=\" \n           Observations are often coded in multiple code systems.\n           - LOINC provides a very specific code (though not more specific in this particular case)\n           - snomed provides a clinically relevant code that is usually less granular than LOINC\n           - the source system provides its own code, which may be less or more granular than LOINC\n\nthis is shown here to demonstrate  the concept of translations within the codeableConcept datatype. The diastolic code below only has a LOINC code\n            \">Systolic blood pressure <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#8480-6; <a href=\"https://browser.ihtsdotools.org/\">SNOMED CT</a>#271649006; clinical-codes#bp-s &quot;Systolic Blood pressure&quot;)</span></span></p><p><b>value</b>: 107 mmHg<span style=\"background: LightGoldenRodYellow\"> (Details: UCUM code mm[Hg] = 'mmHg')</span></p></blockquote><blockquote><p><b>component</b></p><p><b>code</b>: Diastolic blood pressure <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"https://loinc.org/\">LOINC</a>#8462-4)</span></p><p><b>dataAbsentReason</b>: <span title=\"    Here the Diastolic measurement is missing and we give a reason using the DataAbsentReason element    \">Not Performed <span style=\"background: LightGoldenRodYellow; margin: 4px; border: 1px solid khaki\"> (<a href=\"http://terminology.hl7.org/5.5.0/CodeSystem-data-absent-reason.html\">DataAbsentReason</a>#not-performed)</span></span></p></blockquote></div>"
  },
  "identifier" : [{
    "system" : "urn:ietf:rfc:3986",
    "value" : "urn:uuid:187e0c12-8dd2-67e2-99b2-bf273c878281"
  }],
  "status" : "final",
  "category" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/observation-category",
      "code" : "vital-signs",
      "display" : "Vital Signs"
    }]
  }],
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "85354-9",
      "display" : "Blood pressure panel with all children optional"
    }],
    "text" : "Blood pressure systolic & diastolic"
  },
  "subject" : {
    "reference" : "Patient/example"
  },
  "effectiveDateTime" : "2012-09-17",
  "performer" : [{
    "reference" : "Practitioner/example"
  }],
  "interpretation" : [{
    "coding" : [{
      "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
      "code" : "L",
      "display" : "low"
    }],
    "text" : "Below low normal"
  }],
  "bodySite" : {
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "368209003",
      "display" : "Right arm"
    }]
  },
  "component" : [{
    "code" : {
      "coding" : [{
        "system" : "http://loinc.org",
        "code" : "8480-6",
        "display" : "Systolic blood pressure"
      },
      {
        "system" : "http://snomed.info/sct",
        "code" : "271649006",
        "display" : "Systolic blood pressure"
      },
      {
        "system" : "http://acme.org/devices/clinical-codes",
        "code" : "bp-s",
        "display" : "Systolic Blood pressure"
      }]
    },
    "valueQuantity" : {
      "value" : 107,
      "unit" : "mmHg",
      "system" : "http://unitsofmeasure.org",
      "code" : "mm[Hg]"
    }
  },
  {
    "code" : {
      "coding" : [{
        "system" : "http://loinc.org",
        "code" : "8462-4",
        "display" : "Diastolic blood pressure"
      }]
    },
    "dataAbsentReason" : {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/data-absent-reason",
        "code" : "not-performed",
        "display" : "Not Performed"
      }]
    }
  }]
}