Details
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Change Request
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Resolution: Persuasive with Modification
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Medium
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US Core (FHIR)
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current
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Cross-Group Projects
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US Core Blood Pressure Profile
US Core Pulse Oximetry Profile -
1) add Value[x] element to Pulse OX profile
valueQuantityS 0..1 Quantity S Vital Sign Component Value 
valueS 1..1 decimal Numerical value (with implicit precision) unitS 1..1 string Unit representation 
systemS 1..1 uri System that defines coded unit form
Fixed Value: http://unitsofmeasure.org
codeS 1..1 code Coded form of the unit
Fixed Value: %2) add Profile specific guidance to BP profile to state that Because the values are communicated in the systolic and diastolic components, the value[x] element should be omitted.
1) add Value [x] element to Pulse OX profile valueQuantity S 0..1 Quantity S Vital Sign Component Value value S 1..1 decimal Numerical value (with implicit precision) unit S 1..1 string Unit representation system S 1..1 uri System that defines coded unit form Fixed Value: http://unitsofmeasure.org code S 1..1 code Coded form of the unit Fixed Value: % 2) add Profile specific guidance to BP profile to state that Because the values are communicated in the systolic and diastolic components, the value [x] element should be omitted. -
Eric Haas/Brett Marquard: 13-0-1
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Enhancement
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Compatible, substantive
Description
The specification makes no comment on Observation.value[s] for blood pressure and pulse oximetry profiles.
From my pov, there's no proper use for the observation value on blood pressure, and it should be prohibited, but if not, the expectations should be clear, and there should be a piece of documentation that says: Don't use this. or you must populate this, or you might use this, and if you do use it, what goes there is a text representation like 120/80, and it must agree with the systolic and diastolic values, and consumers are always free to ignore it
For pulse oximetry, the value is important - it's the actual O2 Sat. But this is not stated anywhere, and the element is not constrained. There should be a constraint that fixes the Observation.value[x] to a quantity, and fixes the UCUM unit to %, and says that the value is the actual O2 %
See US Core Blood pressure for discussion
