Release 4B

This page is part of the FHIR Specification (v4.3.0: R4B - STU). The current version which supercedes this version is 5.0.0. For a full list of available versions, see the Directory of published versions . Page versions: R4B R4

Extension: focusCode

Orders and Observations Work Group

Maturity Level: 1

Informative

Use Context: Any

URL for this extension:

http://hl7.org/fhir/StructureDefinition/observation-focusCode

Status: draft. Extension maintained by: Health Level Seven, Inc. - OO WG

A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors.

Comment:

Use Observation.specimen element to describe the specimen. Only used if not implicit in code found in Observation.code.

Context of Use: Use on Element ID Observation

Summary

Name	Flags	Card.	Type	Description & Constraints
focusCode		0..1	CodeableConcept	URL = http://hl7.org/fhir/StructureDefinition/observation-focusCode focusCode: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors. Binding: Focal Subject Codes (example): Derived from both HL7 v3 and SNOMED CT code systems Use on Element ID Observation
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/observation-focusCode focusCode: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors. Use on Element ID Observation
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/observation-focusCode"
value[x]	1..1	CodeableConcept	Value of extension Binding: Focal Subject Codes (example): Derived from both HL7 v3 and SNOMED CT code systems
Documentation for this format

XML Template

<!-- focusCode -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-focusCode" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!--  1..1 CodeableConcept Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // focusCode
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-focusCode", // R! 
    "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
  }

Summary

Name	Flags	Card.	Type	Description & Constraints
focusCode		0..1	CodeableConcept	URL = http://hl7.org/fhir/StructureDefinition/observation-focusCode focusCode: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors. Binding: Focal Subject Codes (example): Derived from both HL7 v3 and SNOMED CT code systems Use on Element ID Observation
Documentation for this format

Full Structure

Name	Card.	Type	Description & Constraints
extension	0..1	Extension	URL = http://hl7.org/fhir/StructureDefinition/observation-focusCode focusCode: A code representing the focus of an observation when the focus is not the patient of record. In other words, the focus of the observation is different from Observation.subject. An example use case would be using the Observation resource to capture whether the mother is trained to change her child's tracheostomy tube. In this example, the child is the patient of record and the mother is focal subject referenced using this extension. Other example focal subjects include spouses, related persons, feti, or donors. Use on Element ID Observation
extension	0..0
url	1..1	uri	"http://hl7.org/fhir/StructureDefinition/observation-focusCode"
value[x]	1..1	CodeableConcept	Value of extension Binding: Focal Subject Codes (example): Derived from both HL7 v3 and SNOMED CT code systems
Documentation for this format

XML Template

<!-- focusCode -->

<extension xmlns="http://hl7.org/fhir"
     url="http://hl7.org/fhir/StructureDefinition/observation-focusCode" >
  <!-- from Element: extension -->
 <valueCodeableConcept><!--  1..1 CodeableConcept Value of extension --></valueCodeableConcept>
</extension>

JSON Template

{ // focusCode
  // from Element: extension
    "extension" : [ //  sliced by value:url  in the specified order, Open ]
    "url" : "http://hl7.org/fhir/StructureDefinition/observation-focusCode", // R! 
    "valueCodeableConcept" : { CodeableConcept } // C? R! Value of extension
  }

Constraints

ele-1: All FHIR elements must have a @value or children unless an empty Parameters resource (xpath: @value|f:*|h:div|self::f:Parameters)
ext-1: Must have either extensions or value[x], not both (xpath: exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')]))
ele-1: On Extension.extension: All FHIR elements must have a @value or children (xpath on Extension.extension: @value|f:*|h:div)
ext-1: On Extension.extension: Must have either extensions or value[x], not both (xpath on Extension.extension: exists(f:extension)!=exists(f:*[starts-with(local-name(.), "value")]))
ele-1: On Extension.value[x]: All FHIR elements must have a @value or children (xpath on Extension.value[x]: @value|f:*|h:div)