Real-world patient - CO2

{
  "resourceType" : "Observation",
  "id" : "f203",
  "identifier" : [{
    "system" : "https://intranet.aumc.nl/labvalues",
    "value" : "1304-03720-Bicarbonate"
  }],
  "status" : "final",
  "code" : {
    "coding" : [{
      "system" : "http://loinc.org",
      "code" : "1963-8",
      "display" : "Bicarbonate [Moles/volume] in Serum or Plasma"
    },
    {
      "system" : "http://snomed.info/sct",
      "code" : "365722008",
      "display" : "Bicarbonate level"
    }]
  },
  "subject" : {
    "reference" : "Patient/f201",
    "display" : "Roel"
  },
  "issued" : "2013-04-04T14:34:00+01:00",
  "performer" : [{
    "reference" : "Practitioner/f202",
    "display" : "Luigi Maas"
  }],
  "valueQuantity" : {
    "value" : 28,
    "unit" : "mmol/L",
    "system" : "http://snomed.info/sct",
    "code" : "258813002"
  },
  "interpretation" : [{
    "coding" : [{
      "system" : "http://snomed.info/sct",
      "code" : "166698001",
      "display" : "Serum bicarbonate level normal"
    },
    {
      "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationInterpretation",
      "code" : "N"
    }]
  }],
  "method" : {
    "text" : "enzymatic method"
  },
  "referenceRange" : [{
    "low" : {
      "value" : 22
    },
    "high" : {
      "value" : 29
    },
    "type" : {
      "coding" : [{
        "system" : "http://terminology.hl7.org/CodeSystem/referencerange-meaning",
        "code" : "normal",
        "display" : "Normal Range"
      }]
    }
  }]
}