BG DeviceMetric Example

{
    "resourceType": "DeviceMetric",
    "id": "bg-devicemetric-1",
    "identifier": {
        "system": "http://roche.com/fhir/rdc/sid/devicemetric-identifier",
        "value": "41653-7"
    },
    "type": {
        "coding":  [
            {
                "system": "http://loinc.org",
                "code": "41653-7",
                "display": "Glucose [Mass/volume] in Capillary blood by Glucometer"
            }
        ]
    },
    "unit": {
        "coding":  [
            {
                "system": "http://unitsofmeasure.org",
                "code": "mg/dL",
                "display": "milligram per deciliter"
            }
        ]
    },
    "source": {
        "reference": "Device/bg-device-1"
    },
    "parent": {
        "reference": "DeviceComponent/bg-devicecomponent-1"
    },
    "operationalStatus": "on",
    "category": "measurement"
}