Devices on FHIR - Point-of-Care Device General Implementation Guide

Numeric Observation Profile

Canonical URL

http://devices.fhir.org/StructureDefinition/NumericObservation

Profile Definition

NumericObservation (Observation)	I		http://hl7.org/fhir/StructureDefinition/Observation	There are no (further) constraints on this element Element id Observation Data type http://hl7.org/fhir/StructureDefinition/Observation Constraints pocd-obs-1: If there is no value a dataAbsentReason shall be present `value.exists() or dataAbsentReason.exists()`
extension				There are no (further) constraints on this element Element id Observation.extension Sliced: Unordered, Open, by url(Value)
measurementStatus			Extension(code)	There are no (further) constraints on this element Element id Observation.extension:measurementStatus Short description Measurement status Definition The Measurement Status extension provides more detailed status information about observed values. It gets a code from the Measurement Status value set. Data type Extension(code) Extension URL http://devices.fhir.org/StructureDefinition/observation-measurement-status
code				There are no (further) constraints on this element Element id Observation.code Short description Numeric type Definition Observation.code shall have a coding from the ISO/IEEE 11073 MDC metrics nomenclature. The Rosetta Terminology Mapping Management System (RTMMS) lists available codes. Depending on the type of measurement, the Vital Signs profiles may require an additional LOINC code.
coding		1..		There are no (further) constraints on this element Element id Observation.code.coding Sliced: Unordered, Open, by system(Value)
11073MDC		1..1		There are no (further) constraints on this element Element id Observation.code.coding:11073MDC Short description 11073 MDC code Definition Code defined by the ISO/IEEE 11073-10101 Nomenclature
system		1..	Fixed Value	There are no (further) constraints on this element Element id Observation.code.coding:11073MDC.system Fixed value urn:iso:std:iso:11073:10101
code		1..		There are no (further) constraints on this element Element id Observation.code.coding:11073MDC.code
subject		1..	Reference(http://hl7.org/fhir/StructureDefinition/Patient \| PoC Device Profile)	There are no (further) constraints on this element Element id Observation.subject Definition Observation.subject shall be present and refer to a Patient resource or PoC Device resource. Data type Reference(http://hl7.org/fhir/StructureDefinition/Patient \| PoC Device Profile)
value[x]				There are no (further) constraints on this element Element id Observation.value[x] Definition Either Observation.valueQuantity or Observation.valueRatio or, if there is no value, Observation.dataAbsentReason shall be present. Values shall have a UCUM unit code. Sliced: Unordered, Open, by $this(Type)
valueQuantity	I		Quantity	There are no (further) constraints on this element Element id Observation.value[x]:valueQuantity Data type Quantity
value		1..		There are no (further) constraints on this element Element id Observation.value[x]:valueQuantity.value
system			Fixed Value	There are no (further) constraints on this element Element id Observation.value[x]:valueQuantity.system Fixed value http://unitsofmeasure.org
valueRatio	I		Ratio	There are no (further) constraints on this element Element id Observation.value[x]:valueRatio Data type Ratio
numerator				There are no (further) constraints on this element
value		1..		There are no (further) constraints on this element Element id Observation.value[x]:valueRatio.numerator.value
system			Fixed Value	There are no (further) constraints on this element Element id Observation.value[x]:valueRatio.numerator.system Fixed value http://unitsofmeasure.org
denominator				There are no (further) constraints on this element
value		1..		There are no (further) constraints on this element Element id Observation.value[x]:valueRatio.denominator.value
system			Fixed Value	There are no (further) constraints on this element Element id Observation.value[x]:valueRatio.denominator.system Fixed value http://unitsofmeasure.org
dataAbsentReason	I			There are no (further) constraints on this element Element id Observation.dataAbsentReason
device		1..	Reference(Numeric DeviceMetric Profile)	There are no (further) constraints on this element Element id Observation.device Definition Observation.device shall be present and refer to the Numeric DeviceMetric resource where this observation belongs to. Data type Reference(Numeric DeviceMetric Profile)

Example (XML view)

Example of a Heart Rate Numeric Observation

<Observation xmlns="http://hl7.org/fhir">
    <id value="622" />
    <meta>
        <profile value="http://devices.fhir.org/StructureDefinition/NumericObservation" />
    </meta>
    <status value="final" />
    <category>
        <coding>
            <system value="http://hl7.org/fhir/observation-category" />
            <code value="vital-signs" />
            <display value="Vital Signs" />
        </coding>
    </category>
    <code>
        <coding>
            <system value="http://loinc.org" />
            <code value="8867-4" />
            <display value="Heart rate" />
        </coding>
        <coding>
            <system value="urn:iso:std:iso:11073:10101" />
            <code value="147842" />
            <display value="MDC_ECG_CARD_BEAT_RATE" />
        </coding>
    </code>
    <subject>
        <reference value="Patient/371" />
    </subject>
    <effectiveDateTime value="2017-06-02T11:04:46+02:00" />
    <valueQuantity>
        <value value="60" />
        <unit value="bpm" />
        <system value="http://unitsofmeasure.org" />
        <code value="/min" />
    </valueQuantity>
    <device>
        <reference value="DeviceMetric/215" />
    </device>
</Observation>

Example (JSON view)

Example of a Heart Rate Numeric Observation

{
    "resourceType": "Observation",
    "id": "622",
    "meta": {
        "profile":  [
            "http://devices.fhir.org/StructureDefinition/NumericObservation"
        ]
    },
    "status": "final",
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://hl7.org/fhir/observation-category",
                    "code": "vital-signs",
                    "display": "Vital Signs"
                }
            ]
        }
    ],
    "code": {
        "coding":  [
            {
                "system": "http://loinc.org",
                "code": "8867-4",
                "display": "Heart rate"
            },
            {
                "system": "urn:iso:std:iso:11073:10101",
                "code": "147842",
                "display": "MDC_ECG_CARD_BEAT_RATE"
            }
        ]
    },
    "subject": {
        "reference": "Patient/371"
    },
    "effectiveDateTime": "2017-06-02T11:04:46+02:00",
    "valueQuantity": {
        "value": 60,
        "unit": "bpm",
        "system": "http://unitsofmeasure.org",
        "code": "/min"
    },
    "device": {
        "reference": "DeviceMetric/215"
    }
}