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  "resourceType": "StructureDefinition",
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  "url": "http://linkehr.com/fhir/logicalmodel-pao2_fio2ratio-R4",
  "identifier": [
    {
      "system": "openEHR-CKM",
      "value": "openEHR-EHR-OBSERVATION.pf_ratio.v1"
    }
  ],
  "version": "0",
  "name": "Pao2_fio2ratio",
  "title": "PaO₂/FiO₂ ratio",
  "status": "draft",
  "date": "2024-06-18",
  "publisher": "openEHR",
  "contact": [
    {
      "telecom": [
        {
          "system": "url",
          "value": "http://www.veratech.es"
        }
      ]
    }
  ],
  "description": "Ratio between the partial pressure of oxygen in blood (PaO₂) and the fraction of oxygen in the inhaled air (FiO₂).",
  "purpose": "Use to record the ratio between the partial pressure of oxygen in blood (PaO₂) and the fraction of oxygen in the inspired air (FiO₂).",
  "fhirVersion": "4.0.0",
  "mapping": [
    {
      "identity": "openEHR",
      "uri": "http://openehr.org",
      "name": "openEHR Mapping"
    },
    {
      "identity": "openEHR-natural",
      "uri": "http://openehr.org",
      "name": "openEHR natural path"
    }
  ],
  "kind": "logical",
  "abstract": false,
  "type": "StructureDefinition",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Element",
  "snapshot": {
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        "id": "PaO₂_FiO₂_ratio",
        "path": "PaO₂_FiO₂_ratio",
        "short": "PaO₂/FiO₂ ratio",
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        "min": 1,
        "max": "1",
        "base": {
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        "mustSupport": true,
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        "isSummary": true
      },
      {
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        "definition": "@ internal @",
        "min": 0,
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        "base": {
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      {
        "id": "PaO₂_FiO₂_ratio.protocol.Extension",
        "path": "PaO₂_FiO₂_ratio.protocol.Extension",
        "short": "Extension",
        "definition": "Additional information required to extend the model with local content or to align with other reference models or formalisms.",
        "min": 0,
        "max": "*",
        "base": {
          "path": "PaO₂_FiO₂_ratio.protocol.Extension",
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      },
      {
        "id": "PaO₂_FiO₂_ratio.History",
        "path": "PaO₂_FiO₂_ratio.History",
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        "definition": "@ internal @",
        "min": 0,
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        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event",
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        "min": 0,
        "max": "*",
        "base": {
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        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.data.Ratio",
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        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.data.Ratio.value",
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        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.data.Clinical_interpretation",
        "short": "Clinical interpretation",
        "definition": "A clinical interpretation of the PaO₂/FiO₂ ratio.",
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        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.data.Comment",
        "short": "Comment",
        "definition": "Additional narrative about the PaO₂/FiO₂ ratio not captured in other fields.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.data.Comment",
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        "min": 0,
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        "base": {
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        "definition": "@ internal @",
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        "id": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.state.Confounding_factors",
        "path": "PaO₂_FiO₂_ratio.History.Any_point_in_time_event.state.Confounding_factors",
        "short": "Confounding factors",
        "definition": "Issues or factors that may impact on measurement of the PaO₂/FiO₂ ratio, not captured in other fields.",
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        "base": {
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