Stream: implementers
Topic: Baseline observations
David Hay (Mar 18 2019 at 18:02):
What's the best way to record that a particular observation should be treated as a baseline measure? (ie one user for later comparison? I guess an option could be a category - though I suspect that an extension is cleaner...
John Moehrke (Mar 18 2019 at 19:31):
Isn't that what an ObservationDefinition is?
Grahame Grieve (Mar 18 2019 at 19:58):
what makes something a base line measure? I thought it was where it is used rather than an inherent property of the observation
Lloyd McKenzie (Mar 18 2019 at 23:40):
@John Moehrke ObservationDefinition defines a kind of Observation that's possible. A 'baseline' Observation is a patient-specific Observation taken at a particular time intended to be used for comparison to subsequent observations - often prior to start of a therapy.
I think that a baseline can be designated in one of two ways. Either that's flagged as the purpose for a particular Observation in a protocol or plan (i.e. PlanDefinition or CarePlan) or it's an asserted relationship from a non-baseline resource to the baseline it's comparing against.
Eric Haas (Mar 19 2019 at 00:03):
What I first thought was using http://build.fhir.org/extension-observation-sequelto.html but that has a slightly different connotation. it is really relative to a specific protocol like a stim test, perhaps we could broaden the defiinition?
However I think of baseline measurements clinically as in I want to compare these xrays 8 weeks out to the post op xrays. so I agree with GG not something inherent on the observation but maybe the baseline encounter for that condition?
Lloyd McKenzie (Mar 19 2019 at 00:13):
It could be a baseline for an episode of care, not sure about a Condition.
Last updated: Apr 12 2022 at 19:14 UTC
