PROTECT-CHILD Pediatric Transplant Data Implementation Guide, published by Protect Child. This guide is not an authorized publication; it is the continuous build for version 0.1.0-ci-build built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7-eu/protect-child/ and changes regularly. See the Directory of published versions

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Extension: Lab test reference

Official URL: https://hl7.eu/fhir/ig/hl7.eu.fhir.protect-child/StructureDefinition/lab-result-labtest-ref				Version: 0.1.0-ci-build
Draft as of 2026-02-09				Computable Name: LabResultLabTestRef

lab_test_id – reference to the lab test definition (LabTest catalog row) associated with this lab result.

Context of Use

This extension may be used on the following element(s)

• Element ID: Observation

Usage info

Usages:

• Use this Extension: Lab Result
• Examples for this Extension: Observation/lab-result-observation-example-1

You can also check for usages in the FHIR IG Statistics

Formal Views of Extension Content

Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work.

 

Other representations of profile: CSV, Excel, Schematron

Constraints

Id	Grade	Path(s)	Description	Expression
ele-1	error	**ALL** elements	All FHIR elements must have a @value or children	hasValue() or (children().count() > id.count())
ext-1	error	**ALL** extensions	Must have either extensions or value[x], not both	extension.exists() != value.exists()