<?xml version="1.0" encoding="UTF-8"?>

<CodeSystem xmlns="http://hl7.org/fhir">
  <id value="hddt-lung-function-reference-value-method-codes"/>
  <language value="en"/>
  <text>
    <status value="generated"/><div xml:lang="en" xmlns="http://www.w3.org/1999/xhtml" lang="en"><p class="res-header-id"><b>Generated Narrative: CodeSystem hddt-lung-function-reference-value-method-codes</b></p><a name="hddt-lung-function-reference-value-method-codes"> </a><a name="hchddt-lung-function-reference-value-method-codes"> </a><div style="display: inline-block; background-color: #d9e0e7; padding: 6px; margin: 4px; border: 1px solid #8da1b4; border-radius: 5px; line-height: 60%"><p style="margin-bottom: 0px">Language: en</p></div><p>This case-insensitive code system <code>https://gematik.de/fhir/hddt/CodeSystem/hddt-lung-function-reference-value-method-codes</code> defines the following codes:</p><table class="codes"><tr><td style="white-space:nowrap"><b>Code</b></td><td><b>Display</b></td><td><b>Definition</b></td></tr><tr><td style="white-space:nowrap">personal-best<a name="hddt-lung-function-reference-value-method-codes-personal-best"> </a></td><td>Personal Best</td><td>Reference value based on the personal best value achieved by the patient within a certain time frame.</td></tr><tr><td style="white-space:nowrap">GLI-2012<a name="hddt-lung-function-reference-value-method-codes-GLI-2012"> </a></td><td>Predicted Value according to Global Lung Initiative 2012</td><td>Reference value calculated based on the Global Lung Initiative 2012 equations. I.e the patient's 'race' is considered.</td></tr><tr><td style="white-space:nowrap">GLI-2022<a name="hddt-lung-function-reference-value-method-codes-GLI-2022"> </a></td><td>Predicted Value according to Global Lung Initiative 2022</td><td>Reference value calculated based on the Global Lung Initiative 2022 equations. I.e. a 'race'-neutral approach is used.</td></tr><tr><td style="white-space:nowrap">other<a name="hddt-lung-function-reference-value-method-codes-other"> </a></td><td>Other</td><td>Other method used to determine the lung function reference value. Specify details via text input.</td></tr></table></div>
  </text>
  <extension url="http://hl7.org/fhir/StructureDefinition/resource-effectivePeriod">
    <valuePeriod>
      <start value="2026-04-01"/>
    </valuePeriod>
  </extension>
  <extension url="http://hl7.org/fhir/StructureDefinition/artifact-author">
    <valueContactDetail>
      <name value="gematik GmbH"/>
    </valueContactDetail>
  </extension>
  <url value="https://gematik.de/fhir/hddt/CodeSystem/hddt-lung-function-reference-value-method-codes"/>
  <version value="1.0.0"/>
  <name value="HddtLungFunctionReferenceValueMethodCodes"/>
  <title value="Lung Function Reference Value Method Codes"/>
  <status value="active"/>
  <experimental value="false"/>
  <date value="2026-04-01"/>
  <publisher value="gematik GmbH"/>
  <contact>
    <name value="gematik GmbH"/>
    <telecom>
      <system value="url"/>
      <value value="https://www.gematik.de"/>
    </telecom>
  </contact>
  <description value="Dieses CodeSystem ist Teil der Health Device Data Transfer Spezifikation (HDDT), die Profile, Operationen und ValueSets für den Datenaustausch zwischen &#xA;Hilfsmitteln und digitalen Gesundheitsanwendungen (DiGA) definiert. Zentrales Element der HDDT-Spezifikation sind _Mandatory Interoperable Values_ (MIVs).&#xA;MIVs sind Klassen von Messwerten, die zu definierten Anwendungsfällen und Zwecken von DiGA beitragen.&#xA;&#xA;Der MIV _HddtMivLungFunctionTesting_ erfordert Referenzwerte zur Bewertung gemessener Lungenfunktionswerte. Diese Referenzwerte können mit unterschiedlichen&#xA;Methoden bestimmt werden. Dieses CodeSystem stellt Codes zur Verfügung, um typische Methoden zur Bestimmung von Lungenfunktions-Referenzwerten auszudrücken.&#xA;&#xA;--&#xA;&#xA;This CodeSystem is part of the Health Device Data Transfer specification (HDDT) which defines profiles, operations, and value sets &#xA;for sharing data between medical aids and digital health applications (DiGA). Core of the HDDT specification are _Mandatory Interoperable &#xA;Values_ (MIVs). MIVs are classes of measurements that contribute to defined use cases and purposes of DiGA.&#xA;&#xA;The MIV _HddtMivLungFunctionTesting_ requires reference values for evaluating measured lung function values. These reference&#xA;values can be determined using different methods. This CodeSystem provides codes to express typical methods for determining lung function reference values."/>
  <copyright value="gematik GmbH."/>
  <caseSensitive value="false"/>
  <valueSet value="https://gematik.de/fhir/hddt/ValueSet/hddt-lung-function-reference-value-method-codes|1.0.0"/>
  <versionNeeded value="true"/>
  <content value="complete"/>
  <count value="4"/>
  <concept>
    <code value="personal-best"/>
    <display value="Personal Best"/>
    <definition value="Reference value based on the personal best value achieved by the patient within a certain time frame."/>
  </concept>
  <concept>
    <code value="GLI-2012"/>
    <display value="Predicted Value according to Global Lung Initiative 2012"/>
    <definition value="Reference value calculated based on the Global Lung Initiative 2012 equations. I.e the patient's 'race' is considered."/>
  </concept>
  <concept>
    <code value="GLI-2022"/>
    <display value="Predicted Value according to Global Lung Initiative 2022"/>
    <definition value="Reference value calculated based on the Global Lung Initiative 2022 equations. I.e. a 'race'-neutral approach is used."/>
  </concept>
  <concept>
    <code value="other"/>
    <display value="Other"/>
    <definition value="Other method used to determine the lung function reference value. Specify details via text input."/>
  </concept>
</CodeSystem>