Prevention Instructions Extension

Canonical	../StructureDefinition/nexus-prevention-instructions
Status	draft (experimental) · 1.26.0
Base	Extension (constraint)
Context	Immunization (element), Observation (element)
Source	FSH · JSON

The instructions given to the patient in connection with this prevention: what to do, watch for, or come back for after it was administered or performed.

Overview

This is what the patient was told, not how the product was given. The administration itself is described by Immunization.route, Immunization.site and Immunization.doseQuantity, all coded. This element carries the aftercare sentence -- "observe 15 minutes", "return if swelling persists past 48 hours" -- which is written for a person and is not drawn from any value set.

It is not a clinical comment. The resource's note is where a person's remarks about the record live, and a consumer is entitled to render every note repeat verbatim as a comment. This is a distinct field with its own editing lifecycle, which is why it has its own address.

At most one per resource. A reader meeting more than one should take the first.

MIGRATION. Write this extension. A reader of records written before this extension existed may find the same information carried as free text inside the resource's note; that carriage is not part of this specification, is not produced going forward, and a consumer that wants it from older records has to read it from where it was written. Moving the existing data is outstanding work and is not described here.