AU eRequesting Implementation Guide
1.0.0-ci-build - CI Build

AU eRequesting Implementation Guide, published by HL7 Australia. This guide is not an authorized publication; it is the continuous build for version 1.0.0-ci-build built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/hl7au/au-fhir-erequesting/ and changes regularly. See the Directory of published versions

## Extension: AU eRequesting Fasting Precondition

Official URL: http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition | Version: 1.0.0-ci-build
Standards status: Draft | Maturity Level: 1 | Computable Name: AUeRequestingFastingPrecondition
Copyright/Legal: Used by permission of HL7 International, all rights reserved Creative Commons License. HL7 Australia© 2024+; Licensed Under Creative Commons No Rights Reserved.

This extension applies to the ServiceRequest resource and is used to represent whether fasting is a recommended precondition for the diagnostic request. It conveys the requester’s recommendation regarding fasting at the time of ordering, not the actual fasting status of the patient.

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

- Element ID ServiceRequest

Usages:

- Use this Extension: AU eRequesting Diagnostic Request
- Examples for this Extension: ServiceRequest/order-glu-1 and ServiceRequest/order-urinemcs-1

You can also check for usages in the FHIR IG Statistics

Changes since version 1.0.0-ballot:

- The resource metadata has changed (description)
- The data elements list has changed
- One or more text definitions, invariants or bindings have changed

### Formal Views of Extension Content

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

- Differential Table
- Snapshot Table
- All

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Fasting precondition
extension |  | 0..0 |  |
url |  | 1..1 | uri | "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition"
value[x] |  | 1..1 | CodeableConcept | Value of extension Binding: Pathology Fasting Status (required)
Documentation for this format

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Fasting precondition
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  |
url |  | 1..1 | uri | "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition"
value[x] |  | 1..1 | CodeableConcept | Value of extension Binding: Pathology Fasting Status (required)
Documentation for this format

This structure is derived from Extension

Summary

Simple Extension with the type CodeableConcept: This extension applies to the ServiceRequest resource and is used to represent whether fasting is a recommended precondition for the diagnostic request. It conveys the requester's recommendation regarding fasting at the time of ordering, not the actual fasting status of the patient.

Maturity: 1

Differential View

This structure is derived from Extension

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Fasting precondition
extension |  | 0..0 |  |
url |  | 1..1 | uri | "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition"
value[x] |  | 1..1 | CodeableConcept | Value of extension Binding: Pathology Fasting Status (required)
Documentation for this format

Snapshot View

Name | Flags | Card. | Type | Description & Constraints Filter: Bindings Constraints Obligations
--- | --- | --- | --- | ---
Extension |  | 0..* | Extension | Fasting precondition
id |  | 0..1 | string | Unique id for inter-element referencing
extension |  | 0..0 |  |
url |  | 1..1 | uri | "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition"
value[x] |  | 1..1 | CodeableConcept | Value of extension Binding: Pathology Fasting Status (required)
Documentation for this format

Other representations of profile: CSV, Excel, Schematron

#### Terminology Bindings

Path | Status | Usage | ValueSet | Version | Source
Extension.value[x] | Base | required | Pathology Fasting Status | ⏿1.0.0 | tx.ontoserver.csiro.au

#### 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()`