description: '**Concept**\r\nThe head circumference is the size of the head as measured around the head.\r\n**Purpose**\r\nThe head circumference can provide insight into the growth of a(n unborn) child. There may also be a smaller (microcephaly) or larger (macrocephaly) head circumference than average, which can indicate certain diseases or syndromes.\r\n**Evidence Base**\r\nThe definitions of the concepts were (partly) based on the guidelines Fetal Growth Retardation of the NVOG and PTEN Hamartoma Tumor Syndrome by the VKGN.\r\n**Example Instances**\r\n\r\n**Patient Population**\r\nThe HeadCircumference information model is meant for all patients, including unborn children.\r\n**Traceability to other Standards**\r\nThis health and care information model is in accordance with the information model template Measurement v1.0.'
package_name: healthdata.be.r4.cbb
derivation: specialization
name: HdBeHeadCircumference
abstract: true
type: https://fhir.healthdata.be/StructureDefinition/LogicalModel/head_circumference
elements:
  head_circumference_measuring_method:
    short: HeadCircumferenceMeasuringMethod
    _definition:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: 'Er zijn verschillende methoden om de schedelomvang te meten: prenatale meting via echografisch onderzoek of meting na geboorte met een meetlint door vanaf het achterhoofd (occiput) naar boven de ogen (supraorbitaal) te meten.'}
    type: CodeableConcept
    _short:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: SchedelomvangMeetmethode}
    binding: {strength: extensible, valueSet: 'https://fhir.healthdata.be/ValueSet/SchedelomvangMeetmethode'}
    base: {max: '1', min: 0, path: head_circumference.head_circumference_measuring_method}
    index: 0
  comment:
    short: Comment
    _definition:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: De toelichting op de schedelomvang.}
    type: string
    _short:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: Toelichting}
    base: {max: '1', min: 0, path: head_circumference.comment}
    index: 1
  head_circumference_measurement:
    short: HeadCircumferenceMeasurement
    _definition:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: De waarde van de schedelomvang zoals in millimeters of centimeters gemeten.}
    type: Quantity
    _short:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: SchedelomvangWaarde}
    base: {max: '1', min: 1, path: head_circumference.head_circumference_measurement}
    index: 2
  head_circumference_date:
    short: HeadCircumferenceDate
    _definition:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: De datum waarop de schedelomvang is gemeten.}
    type: dateTime
    _short:
      extension:
      - url: http://hl7.org/fhir/StructureDefinition/translation
        extension:
        - {url: lang, valueCode: nl-NL}
        - {url: content, valueMarkdown: SchedelomvangDatumTijd}
    base: {max: '1', min: 1, path: head_circumference.head_circumference_date}
    index: 3
package_version: 0.5.0-alpha
class: logical
kind: logical
url: https://fhir.healthdata.be/StructureDefinition/LogicalModel/HdBe-HeadCircumference
base: http://hl7.org/fhir/StructureDefinition/Element
version: null
required: [head_circumference_date, head_circumference_measurement]