description: Defines the additional constraints and extensions on the UK Core Observation Vital Signs profile, for recording the clinical observation of a patients head circumference.
package_name: fhir.r4.ukcore.stu3.currentbuild
derivation: constraint
name: UKCoreObservationVitalSignsHeadCircumference
type: Observation
elements:
  code:
    elements:
      coding:
        index: 0
        slicing:
          slices:
            loinc:
              match: {}
              schema:
                index: 0
                elements:
                  code:
                    pattern: {type: Code, value: 9843-4}
                    index: 1
            snomedCT:
              match: {}
              schema:
                binding: {strength: preferred, valueSet: 'https://fhir.hl7.org.uk/ValueSet/UKCore-HeadCircumferenceMeasurements'}
                index: 2
  value:
    choices: [valueQuantity]
    index: 4
  valueQuantity: {type: Quantity, choiceOf: value, index: 5}
  value[x]:
    elements:
      unit:
        pattern: {type: String, value: centimeter}
        index: 6
      system:
        pattern: {type: Uri, value: 'http://unitsofmeasure.org'}
        index: 7
      code:
        pattern: {type: Code, value: cm}
        index: 8
package_version: 0.23.0-pre-release
class: profile
kind: resource
url: https://fhir.hl7.org.uk/StructureDefinition/UKCore-Observation-VitalSigns-HeadCircumference
base: https://fhir.hl7.org.uk/StructureDefinition/UKCore-Observation-VitalSigns
version: 1.0.0
required: [value, valueQuantity]