Inclined to agree with @thomas.beale on the question of ontology. Would be good to see the use case from ITU and I can also revisit how the concepts are modelled in FHIR from a Devices perspective (if that helps).
It’s tempting to think of Pulse and HR as synonyms but as outlined above, Pulse can be an observation of rate, quality and rhythm. HR in ITU is usually observed from the output of a device, using either the ECG, Pulse Oximeter, or sometimes both, as they are measuring different variables (electrical activity vs pulsatility at the periphery).
I think I’m saying in favour of specialising the current archetype somehow, to take account of the ontological difference between the two concepts.
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