# AU eRequesting Fasting Precondition - AU eRequesting Implementation Guide v1.0.0

* [**Table of Contents**](toc.md)
* [**FHIR Artefacts**](fhirartifacts.md)
* [**Artefacts Summary**](artifacts.md)
* **AU eRequesting Fasting Precondition**

## Extension: AU eRequesting Fasting Precondition 

| | | |
| :--- | :--- | :--- |
| *Official URL*:http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition | *Version*:1.0.0 | |
| * Standards status: *[Trial-use](http://hl7.org/fhir/R4/versions.html#std-process) | [Maturity Level](https://build.fhir.org/ig/hl7au/au-fhir-base/generalguidance.html#maturity-levels): 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.

**Context of Use**

**Usage info**

**Usages:**

* Use this Extension: [AU eRequesting Diagnostic Request](StructureDefinition-au-erequesting-diagnosticrequest.md)
* Examples for this Extension: [ServiceRequest/order-glu-1](ServiceRequest-order-glu-1.md) and [ServiceRequest/order-urinemcs-1](ServiceRequest-order-urinemcs-1.md)

You can also check for [usages in the FHIR IG Statistics](https://packages2.fhir.org/xig/hl7.fhir.au.ereq|current/StructureDefinition/au-erequesting-fastingprecondition)

### Formal Views of Extension Content

 [Description of Profiles, Differentials, Snapshots, and how the XML and JSON presentations work](http://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#structure-definitions). 

 

Other representations of profile: [CSV](StructureDefinition-au-erequesting-fastingprecondition.csv), [Excel](StructureDefinition-au-erequesting-fastingprecondition.xlsx), [Schematron](StructureDefinition-au-erequesting-fastingprecondition.sch) 

#### Terminology Bindings

#### Constraints



## Resource Content

```json
{
  "resourceType" : "StructureDefinition",
  "id" : "au-erequesting-fastingprecondition",
  "extension" : [
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
      "valueInteger" : 1
    },
    {
      "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
      "valueCode" : "trial-use",
      "_valueCode" : {
        "extension" : [
          {
            "url" : "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
            "valueCanonical" : "http://hl7.org.au/fhir/ereq/ImplementationGuide/hl7.fhir.au.ereq"
          }
        ]
      }
    }
  ],
  "url" : "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition",
  "version" : "1.0.0",
  "name" : "AUeRequestingFastingPrecondition",
  "title" : "AU eRequesting Fasting Precondition",
  "status" : "active",
  "date" : "2026-02-11T06:15:07+00:00",
  "publisher" : "HL7 Australia",
  "contact" : [
    {
      "name" : "HL7 Australia",
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://confluence.hl7.org/display/HAFWG"
        }
      ]
    },
    {
      "name" : "HL7 Australia FHIR Work Group",
      "telecom" : [
        {
          "system" : "url",
          "value" : "https://confluence.hl7.org/display/HAFWG",
          "use" : "work"
        }
      ]
    }
  ],
  "description" : "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.",
  "jurisdiction" : [
    {
      "coding" : [
        {
          "system" : "urn:iso:std:iso:3166",
          "code" : "AU"
        }
      ]
    }
  ],
  "copyright" : "Used by permission of HL7 International, all rights reserved Creative Commons License. HL7 Australia© 2024+; Licensed Under Creative Commons No Rights Reserved.",
  "fhirVersion" : "4.0.1",
  "mapping" : [
    {
      "identity" : "rim",
      "uri" : "http://hl7.org/v3",
      "name" : "RIM Mapping"
    }
  ],
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [
    {
      "type" : "element",
      "expression" : "ServiceRequest"
    }
  ],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [
      {
        "id" : "Extension",
        "path" : "Extension",
        "short" : "Fasting precondition",
        "definition" : "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."
      },
      {
        "id" : "Extension.extension",
        "path" : "Extension.extension",
        "max" : "0"
      },
      {
        "id" : "Extension.url",
        "path" : "Extension.url",
        "fixedUri" : "http://hl7.org.au/fhir/ereq/StructureDefinition/au-erequesting-fastingprecondition"
      },
      {
        "id" : "Extension.value[x]",
        "path" : "Extension.value[x]",
        "min" : 1,
        "type" : [
          {
            "code" : "CodeableConcept"
          }
        ],
        "binding" : {
          "strength" : "required",
          "valueSet" : "https://healthterminologies.gov.au/fhir/ValueSet/pathology-fasting-status-1"
        }
      }
    ]
  }
}

```
