This page is part of the FHIR Specification (v0.0.82: DSTU 1). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions
Describes the data produced by a device at a point in time.
4.20.1 Scope and Usage
This resource carries a set of data from a device that is observing a subject. Most commonly, the subject is a patient,
and the device is something like a vital signs monitor, or a glucose measurement device, but other kinds of subjects
and devices are expected as well.
This resource does not cater for:
Supporting real-time analytics and in particular, alarms that might be raised as a result of such analysis
Sending commands to a device
This capability is expected to be subject of additional resources that are yet to be developed, and implmenter input on this is welcome.
4.20.2 Boundaries and Relationships
There are 2 device related resources
Device - An administrative resource that tracks individual devices of all kinds and their location. Primarily used for attribution of actions to devices
DeviceObservationReport (this resource) - A record of a set of observations produced by a device
Note that this resource is entirely concerned with devices that report data. Interacting with and
controlling devices such as infusion pumps etc. is not in scope for this resource (no solution for this yet).
This resource is based on ISO 11073.
4.20.3 Background and Context
4.20.3.1 Structure of a Device Data Resource
A medical device is conceived of as a measuring device that is capable of reporting
a series of groups of measurements on a regular basis. The device capabilities resource
describes the kind of data that a medical device reports. Devices are conceptualised
using the following main structure:
Device - The actual device that external systems communicate with. In 11073, this is known as a "Medical Device System" (MDS)
Virtual Medical Device - A medical-related subsystem of a medical device. The virtual device that may be part of the containing device, or a separate device that may be communicating with it
Channel - Groups together physiological measurement data and derived data
Metrics - A piece of measured or derived data that will be reported by the machine, reported as an observation
Facets - Additional data that qualifies the metric, or contributes to its assessment, reported in observation.compartment
Very simple devices may have only a single virtual device with a single channel and one metric, while complex devices may have multiple items at every level.
The correct codes for the source Device and the virtual device, channel and metrics will be
specified in profiles for specific classes of device. Generally, these codes are registered in
the RTM Management service, but
this is not required. See Terminology
Systems for the correct representation of these codes in a Coding datatype
4.20.6 Search Parameters
Search parameters for this resource. The standard parameters also apply. See Searching for more information about searching in REST, messaging, and services.
<!-- from Resource: extension, modifierExtension, language, text, and contained --> <instant value="[instant]"/><!-- 1..1 When the data values are reported --> <identifier><!-- 0..1 Identifier As assigned by the source device --></identifier> <source><!-- 1..1 Resource(Device) Identifies/describes where the data came from --></source> <subject><!-- 0..1 Resource(Patient|Device|Location) Subject of the measurement --></subject> <virtualDevice> <!-- 0..* A medical-related subsystem of a medical device --> <code><!-- 0..1 CodeableConcept Describes the compartment --></code> <channel> <!-- 0..* Groups related data items --> <code><!-- 0..1 CodeableConcept Describes the channel --></code> <metric> <!-- 0..* Piece of data reported by device --> <observation><!-- 1..1 Resource(Observation) The data for the metric --></observation> </metric> </channel> </virtualDevice> </DeviceObservationReport>
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