Stream: implementers
Topic: PlanDefinition for variable dose quantity
Yi Tang (Feb 16 2021 at 23:51):
Hello everyone,
I'm trying to define an orderset with a PlanDefinition. I'm not sure how to represent a medication with a dose quantity that should be calculated using existing patient information. For example, I have a drug whose dose quantity is supposed to be 25 mg/kg of patient weight. Has anyone done this before and have an example, or does anyone have any ideas? Thank you!
René Spronk (Feb 17 2021 at 08:06):
There are variables that allow you to do a thing like that - by the way: this question is probably best posted on the #Care Plan/Care Coordination stream.
Lin Zhang (Feb 17 2021 at 10:16):
Related links:
http://hl7.org/fhir/activitydefinition.html
http://hl7.org/fhir/plandefinition-example.html
Yi Tang (Feb 17 2021 at 14:51):
Thank you @René Spronk
I didn't know there was that stream. I'll check it out.
Yi Tang (Feb 17 2021 at 15:19):
@Lin Zhang Thanks for the links. Though I'm looking for a way to tell the system to calculate the dose quantity based on the patient weight. I'm not sure if I'm seeing it in the examples. Can you help point out where this is defined, please?
Lin Zhang (Feb 17 2021 at 15:55):
Sorry, no practical experience for this. The following are some potentially relevant elements:
ActivityDefinition.dosage (25 mg/kg)
ActivityDefinition.observationRequirement (patient's body weight)
ActivityDefinition.dynamicValue (the dose could be prescribed/dispensed for the patient)
And FHIR resources are "static" artefacts and could do "nothing". An engine would be needed to evaluate the rules/formula.
All the above is necessarily correct and just my understanding for now.
Last updated: Apr 12 2022 at 19:14 UTC
