An identifier created from a combination of the measurement parameters like sensor time stamp, type code, enumeration OID code, patient and device identifiers, and selected elements of any facet component elements.

Allows observations to be distinguished in a selective enough manner to prevent resource duplication.

This value is used in the conditional create to prevent data duplication. PHDs will often re-send already sent data for a variety of reasons. This element is required unless the metric measurement contains no time stamp or is a measurement containing a time stamp that is real time. By real time the time stamp reported by the PHD must be later than the current time reported by the PHD before any measurements are received. Temporarily stored data from IEEE 11073 20601 devices, which are required to delete the data after sending, can also be considered real time. Temporarily stored data from Bluetooth Low Energy Health devices may be resent so these cannot be considered as real time.

For Enumeration OID measurements, none will fall into the category of vital signs so a LOINC encoding is never necessary in this profile.

The information determined as a result of making the observation, if the information is a code.

Provides a reason why the expected value in the element Observation.valueCodeableConcept is missing. This would be an error condition indicated by the Measurement-Status attribute.

The current values in the http://hl7.org/fhir/data-absent-reason system do not provide the same detailed set of options reported in the Measurement-Status. In those cases one uses the generic 'error' code if the error is 'fatal'. The measurementStatusComponent can be used to report more specific information.