description: 'Profile for capturing the relative lung function testings (i.e. an individual measurement divided by the corresponding reference value) \nas FHIR Observation resources.\n\nThis profile defines the exchange of a single relative value for the Mandatory Interoperable Value (MIV) \\\"Lung Function Testing\\\" which is technically defined \nby the ValueSet _hddt-miv-lung-function-testing_. This MIV is e.g. implemented by peak flow meter that can connect to \na Personal Health Gateway (e.g. a mobile app for tracking lung function values) through wireless or wired communication.\n\n**Obligations and Conventions:**\n\nEach Lung Function Testing MAY either hold a reference to a _Sensor Type And Calibration Status_ [DeviceMetric](https://hl7.org/fhir/R4/devicemetric.html) resource or to a \n_Personal Health Device_ [Device](https://hl7.org/fhir/R4/device.html) resource (eXclusive OR). Typically the reference will be \nto a [Device](https://hl7.org/fhir/R4/device.html) resource, but the option to reference a [DeviceMetric](https://hl7.org/fhir/R4/devicemetric.html) \nresource is provided for compatibility with the overarching HDDT specification.\n\nEach instance of this Observation MUST reference the Observations holding the corresponding raw measurement and reference value via the `derivedFrom` element.\n\n**Constraints applied:**  \n- `status` is restricted to _final_\n- `code` is constrained to a subset of the _MIV Lung Function Relative Values_ ValueSet, defined by the _HddtLungFunctionRelativeValues_ ValueSet.\n- `effective[x]` is restricted to `effectiveDateTime` and constrained as mandatory.\n- `value[x]` is restricted to `valueQuantity`. The elements `valueQuantity.value`, `valueQuantity.system`, and `valueQuantity.code` are constrained in a way that a value MUST be provided and that UCUM MUST be used for encoding the unit of measurement. `Observation.valueQuantity` MAY only be omitted in case of an error that accured with the measurement. In this case, `Observation.dataAbsentReason` MUST be provided.\n- `derivedFrom` is constrained to require exactly two references: one to the raw lung function testing Observation and one to the lung function reference value Observation.'
package_name: de.gematik.hddt
derivation: constraint
name: HddtLungFunctionTestingComplete
type: Observation
elements:
  value[x]:
    elements:
      value: {index: 8}
      system:
        pattern: {type: Uri, value: 'http://unitsofmeasure.org'}
        index: 9
      code:
        binding: {strength: required, valueSet: 'http://hl7.org/fhir/ValueSet/ucum-units'}
        index: 10
    required: [value, system, code]
  derivedFrom:
    array: true
    min: 2
    max: 2
    index: 12
    slicing:
      rules: closed
      description: Slice to require one reference to a measurement and one to a reference value
      discriminator:
      - {path: resolve(), type: profile}
      min: 2
      max: 2
      slices:
        measurement:
          match: {}
          schema:
            short: Reference to raw lung function testing
            refers: ['https://gematik.de/fhir/hddt/StructureDefinition/hddt-lung-function-testing']
            type: Reference
            _required: true
            index: 13
          min: 1
          max: 1
        referenceValue:
          match: {}
          schema:
            short: Reference to lung function reference value
            refers: ['https://gematik.de/fhir/hddt/StructureDefinition/hddt-lung-reference-value']
            type: Reference
            _required: true
            index: 14
          min: 1
          max: 1
  valueQuantity: {type: Quantity, short: Calculated lung function value as percentage of reference value, mustSupport: true, choiceOf: value, index: 7}
  value:
    short: Calculated lung function value as percentage of reference value
    mustSupport: true
    choices: [valueQuantity]
    index: 6
  effectiveDateTime: {type: dateTime, short: Time of measurement, choiceOf: effective, index: 4}
  status:
    short: Measurement status
    pattern: {type: Code, value: final}
    index: 0
  effective:
    short: Time of measurement
    choices: [effectiveDateTime]
    index: 3
  code:
    short: Percentage measurement type for lung function
    binding: {strength: required, valueSet: 'https://gematik.de/fhir/hddt/ValueSet/hddt-lung-function-relative-values'}
    index: 1
  device:
    type: Reference
    short: Reference to personal health device
    refers: ['https://gematik.de/fhir/hddt/StructureDefinition/hddt-personal-health-device', 'https://gematik.de/fhir/hddt/StructureDefinition/hddt-sensor-type-and-calibration-status']
    index: 11
package_version: 1.0.0-rc
class: profile
kind: resource
url: https://gematik.de/fhir/hddt/StructureDefinition/hddt-lung-function-testing-complete
base: http://hl7.org/fhir/StructureDefinition/Observation
version: 1.0.0-rc
required: [device, effectiveDateTime, effective]