Describes a measurement, calculation or setting capability of a device.

The DeviceMetric resource is derived from the ISO/IEEE 11073-10201 Domain Information Model standard, but is more widely applicable.

Instance identifiers assigned to a device, by the device or gateway software, manufacturers, other organizations or owners. For example, handle ID.

For identifiers assigned to a device by the device or gateway software, the system element of the identifier should be set to any identifier of the device.

Indicates current operational state of the device. For example: On, Off, Standby, etc.

Indicates the category of the observation generation process. A DeviceMetric can be, for example, a setting, measurement, or calculation.

Describes the type of the metric. For example: Heart Rate, PEEP Setting, etc.

DeviceMetric.type can be referred to either IEEE 11073-10101 or LOINC.

The device to which this DeviceMetric applies. The referenced device may be a top-level device or a component of a device.

If the reference is not to a top-level device, the top-level device may be reached through the device's parent element (possibly recursively).

Describes the unit that an observed value determined for this metric will have. For example: Percent, Seconds, etc.

DeviceMetric.unit can refer to either UCUM or preferably an RTMMS coding system.

The preferred color associated with the metric (e.g., display color). This is often used to aid clinicians to track and identify parameter types by color. In practice, consider a Patient Monitor that has ECG/HR and Pleth; the metrics are displayed in different characteristic colors, such as HR in blue, BP in green, and PR and SpO2 in magenta.

The frequency at which the metric is taken or recorded. Devices measure metrics at a wide range of frequencies; for example, an ECG might sample measurements in the millisecond range, while an NIBP might trigger only once an hour. Less often, the measurementFrequency may be based on a unit other than time, such as distance (e.g., for a measuring wheel). The update period may be different than the measurement frequency, if the device does not update the published observed value with the same frequency as it was measured.

Indicates whether the metric is derived (measured) by a continuous means or by an intermittent means.

For example, a gauge on a pressurized vessel showing current pressure is a continuous measurement, while a thermometer that produces readings on demand is an intermittent measurement. Note that metric availability is typically a static characteristic and is distinct from the operational status.

Describes the calibrations that have been performed or that are required to be performed.

Describes the type of the calibration method.

Describes the state of the calibration.

Describes the time last calibration has been performed.