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

Instance Extension

Canonical URL

http://devices.fhir.org/StructureDefinition/devicecomponent-instance

Extension Definition

Extension	I		Extension	There are no (further) constraints on this element Element id Extension Short description Optional Extensions Element Definition Optional Extension Element - found in all resources. Data type Extension Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
id		0..1	string	There are no (further) constraints on this element Element id Extension.id Short description xml:id (or equivalent in JSON) Definition unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces. Comments Note that FHIR strings may not exceed 1MB in size Data type string Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a
extension	I	0..*	Extension	There are no (further) constraints on this element Element id Extension.extension Short description Additional Content defined by implementations Alternate names extensions, user content Definition May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Comments There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions. The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone. Data type Extension Sliced: Unordered, Open, by url(Value) Extensions are always sliced by (at least) url Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` ext-1: Must have either extensions or value[x], not both `extension.exists() != value.exists()` Mappings rim: n/a rim: N/A
url		1..1	uriFixed Value	Element id Extension.url Short description identifies the meaning of the extension Definition Source of the definition for the extension code - a logical name or a URL. Comments The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension. Data type uri Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Fixed value http://devices.fhir.org/StructureDefinition/devicecomponent-instance Mappings rim: n/a rim: N/A
valueUnsignedInt		0..1	unsignedInt	Element id Extension.value[x]:valueUnsignedInt Short description Instance number Definition Instance number for multiple components of the same type Data type unsignedInt Constraints ele-1: All FHIR elements must have a @value or children `hasValue() \| (children().count() > id.count())` Mappings rim: n/a rim: N/A

Example (XML view)

Example of a Blood Pressure VMD DeviceComponent

<DeviceComponent xmlns="http://hl7.org/fhir">
    <id value="433" />
    <meta>
        <profile value="http://devices.fhir.org/StructureDefinition/VmdDeviceComponent" />
    </meta>
    <extension url="http://devices.fhir.org/StructureDefinition/devicecomponent-instance">
        <valueUnsignedInt value="1" />
    </extension>
    <identifier>
        <use value="temp" />
        <system value="urn:ietf:rfc:3986" />
        <value value="urn:uuid:aa0e1091-5dfe-435b-bb96-c5ce2992e2dc" />
    </identifier>
    <type>
        <coding>
            <system value="urn:iso:std:iso:11073:10101" />
            <code value="69710" />
            <display value="MDC_DEV_ANALY_PRESS_BLD_VMD" />
        </coding>
    </type>
    <source>
        <reference value="Device/72" />
    </source>
    <parent>
        <reference value="DeviceComponent/427" />
    </parent>
    <operationalStatus>
        <coding>
            <system value="http://hl7.org/fhir/operational-status" />
            <code value="transduc-discon" />
            <display value="Transducer Disconnected" />
        </coding>
    </operationalStatus>
</DeviceComponent>

Example (JSON view)

Example of a Blood Pressure VMD DeviceComponent

{
    "resourceType": "DeviceComponent",
    "id": "433",
    "meta": {
        "profile":  [
            "http://devices.fhir.org/StructureDefinition/VmdDeviceComponent"
        ]
    },
    "extension":  [
        {
            "url": "http://devices.fhir.org/StructureDefinition/devicecomponent-instance",
            "valueUnsignedInt": 1
        }
    ],
    "identifier": {
        "use": "temp",
        "system": "urn:ietf:rfc:3986",
        "value": "urn:uuid:aa0e1091-5dfe-435b-bb96-c5ce2992e2dc"
    },
    "type": {
        "coding":  [
            {
                "system": "urn:iso:std:iso:11073:10101",
                "code": "69710",
                "display": "MDC_DEV_ANALY_PRESS_BLD_VMD"
            }
        ]
    },
    "source": {
        "reference": "Device/72"
    },
    "parent": {
        "reference": "DeviceComponent/427"
    },
    "operationalStatus":  [
        {
            "coding":  [
                {
                    "system": "http://hl7.org/fhir/operational-status",
                    "code": "transduc-discon",
                    "display": "Transducer Disconnected"
                }
            ]
        }
    ]
}