{
  "resourceType": "Observation",
  "id": "demo-spiro-mbr-1-2",
  "status": "final",
  "code": {
    "coding": [
      {
        "system": "http://loinc.org",
        "code": "19868-9",
        "display": "Forced vital capacity [Volume] Respiratory system by Spirometry"
      }
    ]
  },
  "subject": {
    "reference": "Patient/demo-patient-1"
  },
  "effectiveDateTime": "2018-03-12",
  "valueQuantity": {
    "value": 4.356,
    "system": "http://unitsofmeasure.org",
    "code": "L"
  }
}