Structured Data Capture
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Structured Data Capture, published by HL7 International / FHIR Infrastructure. This guide is not an authorized publication; it is the continuous build for version 3.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/sdc/ and changes regularly. See the Directory of published versions

: Congestive Heart Failure Logic - JSON Representation

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{
  "resourceType" : "Library",
  "id" : "sdc-CHF",
  "meta" : {
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    "status" : "generated",
    "div" : "<div xmlns=\"http://www.w3.org/1999/xhtml\"><h2>Related Artifacts</h2><table class=\"grid\"><tr><td>depends-on</td><td>SNOMED CT</td><td><a href=\"http://hl7.org/fhir/R4/codesystem-snomedct.html\">SNOMED CT (all versions)</a></td></tr><tr><td>depends-on</td><td>LOINC</td><td><a href=\"http://terminology.hl7.org/5.3.0/CodeSystem-v3-loinc.html\">Logical Observation Identifiers, Names and Codes (LOINC)</a></td></tr><tr><td>depends-on</td><td>Congestive heart failure codes</td><td><a href=\"CodeSystem-chf-codes.html\">CHF Codes</a></td></tr><tr><td>depends-on</td><td>Clinical condition codes</td><td><a href=\"http://terminology.hl7.org/5.3.0/CodeSystem-condition-clinical.html\">Condition Clinical Status Codes</a></td></tr><tr><td>depends-on</td><td>Condition verification status</td><td><a href=\"http://terminology.hl7.org/5.3.0/CodeSystem-condition-ver-status.html\">ConditionVerificationStatus</a></td></tr></table><h2>Parameters</h2><table class=\"grid\"><tr><td>Encounter</td><td>in</td><td>0</td><td>1</td><td>Encounter</td></tr><tr><td>Patient</td><td>out</td><td>0</td><td>1</td><td>Patient</td></tr><tr><td>Body Weight</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Body Weight Change Assertion</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Daily Body Weight</td><td>out</td><td>0</td><td>*</td><td>Resource</td></tr><tr><td>Daily Body Weight Change</td><td>out</td><td>0</td><td>*</td><td>Resource</td></tr><tr><td>Body Weight Change</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Current Body Weight</td><td>out</td><td>0</td><td>1</td><td>Observation</td></tr><tr><td>Previous Body Weight</td><td>out</td><td>0</td><td>1</td><td>Observation</td></tr><tr><td>Current Body Weight Change</td><td>out</td><td>0</td><td>1</td><td>integer</td></tr><tr><td>Urine Output</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Current Urine Output</td><td>out</td><td>0</td><td>1</td><td>Observation</td></tr><tr><td>Net Intake/Output</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Current Net Intake/Output</td><td>out</td><td>0</td><td>1</td><td>Observation</td></tr><tr><td>Jugular Venous Pressure</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Oxygen Saturation</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Potassium</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Creatinine</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>eGFR</td><td>out</td><td>0</td><td>*</td><td>Observation</td></tr><tr><td>Eligibility Criteria</td><td>out</td><td>0</td><td>*</td><td>Condition</td></tr></table><h2>Data Requirements</h2><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"https://loinc.org/29463-7\">Logical Observation Identifiers, Names and Codes (LOINC)</a> 29463-7: Body weight</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"CodeSystem-chf-codes.html#chf-codes-body-weight-change\">CHF Codes</a> body-weight-change: Body weight change</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"https://loinc.org/9192-6\">Logical Observation Identifiers, Names and Codes (LOINC)</a> 9192-6: Urine output 24 hour</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"CodeSystem-chf-codes.html#chf-codes-net-intake-output\">CHF Codes</a> net-intake-output: Net intake/output</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"CodeSystem-chf-codes.html#chf-codes-jvp\">CHF Codes</a> jvp: Jugular venous pressure</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"https://loinc.org/2708-6\">Logical Observation Identifiers, Names and Codes (LOINC)</a> 2708-6: Oxygen saturation in Arterial blood</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"https://loinc.org/86919-8\">Logical Observation Identifiers, Names and Codes (LOINC)</a> 86919-8: Potassium goal [Moles/volume] Serum or Plasma</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"https://loinc.org/39802-4\">Logical Observation Identifiers, Names and Codes (LOINC)</a> 39802-4: Creatinine in dialysis fluid/Creatinine in serum or plasma</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a> (<a href=\"http://hl7.org/fhir/R4/observation.html\">Observation</a>)</td></tr><tr style=\"background-color: #efefef\"><td>Filter</td><td>Value</td></tr><tr><td>code</td><td>One of these codes: <a href=\"CodeSystem-chf-codes.html#chf-codes-egfr\">CHF Codes</a> egfr: eGFR result</td></tr></table><table class=\"grid\"><tr><td colspan=\"2\"><b>Type</b>: <a href=\"http://hl7.org/fhir/R4/condition.html\">Condition</a> (<a href=\"http://hl7.org/fhir/R4/condition.html\">Condition</a>)</td></tr></table><h2>Contents</h2><p><code>text/cql</code></p><pre><code class=\"language-sql\">library CHF version '1.0.0'\r\n\r\nusing FHIR version '4.0.1'\r\n\r\ninclude FHIRHelpers version '4.0.1'\r\n\r\ncodesystem &quot;SNOMED-CT&quot;: 'http://snomed.info/sct'\r\ncodesystem &quot;LOINC&quot;: 'http://loinc.org'\r\ncodesystem &quot;CHFCodes&quot;: 'http://hl7.org/fhir/uv/cpg/CodeSystem/chf-codes'\r\ncodesystem &quot;Condition Clinical Status Code&quot;: 'http://terminology.hl7.org/CodeSystem/condition-clinical'\r\ncodesystem &quot;Condition Verification Status Code&quot;: 'http://terminology.hl7.org/CodeSystem/condition-ver-status'\r\n\r\ncode &quot;Congestive heart failure&quot;: '42343007' from &quot;SNOMED-CT&quot;\r\n\r\ncode &quot;Body weight&quot;: '29463-7' from &quot;LOINC&quot;\r\ncode &quot;Body weight change&quot;: 'body-weight-change' from &quot;CHFCodes&quot;\r\ncode &quot;Urine output&quot;: '9192-6' from &quot;LOINC&quot;\r\ncode &quot;Net intake/output&quot;: 'net-intake-output' from &quot;CHFCodes&quot;\r\ncode &quot;Jugular venous pressure&quot;: 'jvp' from &quot;CHFCodes&quot;\r\ncode &quot;Oxygen saturation&quot;: '2708-6' from &quot;LOINC&quot;\r\ncode &quot;Potassium goal&quot;: '86919-8' from &quot;LOINC&quot; display 'Potassium goal [Moles/volume] Serum or Plasma' // meq/L\r\ncode &quot;Creatinine in serum&quot;: '39802-4' from &quot;LOINC&quot; display 'Creatinine in serum or plasma' // NOTE: example shows mg/dL, but no LOINC code has those units?\r\ncode &quot;eGFR result&quot;: 'egfr' from &quot;CHFCodes&quot; // NOTE: Too many to pick from, needs clinical/terminological SME input, in mol/mm/m2\r\n\r\ncode &quot;Active condition&quot;: 'active' from &quot;Condition Clinical Status Code&quot;\r\ncode &quot;Provisional condition&quot;: 'provisional' from &quot;Condition Verification Status Code&quot;\r\ncode &quot;Confirmed condition&quot;: 'confirmed' from &quot;Condition Verification Status Code&quot;\r\n\r\nparameter Encounter Encounter\r\n\r\ncontext Patient\r\n\r\n// Case Features\r\ndefine &quot;Body Weight&quot;:\r\n  [Observation: &quot;Body weight&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Body Weight Change Assertion&quot;:\r\n  [Observation: &quot;Body weight change&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Body Weight Change&quot;:\r\n  &quot;Daily Body Weight Change&quot; WC\r\n    return Observation {\r\n      id: id { value: Encounter.id + '-bodyweight-change' + ToString(WC.date) },\r\n      extension: {\r\n        Extension {\r\n          url: url { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-instantiatesCaseFeature' },\r\n          value: canonical { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/chf-bodyweight-change' }\r\n        },\r\n        Extension {\r\n          url: url { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureType' },\r\n          value: code { value: 'asserted' }\r\n        }\r\n      },\r\n      status: ObservationStatus { value: 'final' },\r\n      code: CodeableConcept {\r\n        coding: {\r\n          Coding {\r\n            system: uri { value: 'http://hl7.org/fhir/uv/cpg/CodeSystem/chf-codes' },\r\n            code: code { value: 'body-weight-change' }\r\n          }\r\n        }\r\n      },\r\n      effective: dateTime { value: WC.date },\r\n      issued: instant { value: Now() },\r\n      subject: referenceTo(Patient),\r\n      encounter: referenceTo(Encounter),\r\n      value: Quantity {\r\n        value: decimal { value: WC.change.value },\r\n        unit: string { value: WC.change.unit },\r\n        system: uri { value: 'http://unitsofmeasure.org' },\r\n        code: code { value: WC.change.unit }\r\n      }\r\n    }\r\n\r\ndefine &quot;Daily Body Weight&quot;:\r\n  (expand Encounter.period per day) Date\r\n    let maxWeight: Max(&quot;Body Weight&quot; WT where WT.issued same day as Date return WT.value as FHIR.Quantity)\r\n    return { date: Date, weight: maxWeight }\r\n\r\ndefine &quot;Daily Body Weight Change&quot;:\r\n  &quot;Daily Body Weight&quot; WT\r\n    let priorWeight: First(&quot;Daily Body Weight&quot; PWT where PWT.date &lt; WT.date sort by date descending).weight\r\n    return { date: WT.date, weight: WT.weight, priorWeight: priorWeight, change: WT.weight - priorWeight}\r\n\r\ndefine &quot;Current Body Weight&quot;:\r\n  First(&quot;Body Weight&quot; WT where WT.issued same day as Today() sort by issued descending)\r\n\r\ndefine &quot;Previous Body Weight&quot;:\r\n  First(&quot;Body Weight&quot; WT where WT.issued 1 day before day of Today() sort by issued descending)\r\n\r\ndefine &quot;Current Body Weight Change&quot;:\r\n  &quot;Current Body Weight&quot;.value - &quot;Previous Body Weight&quot;.value\r\n\r\ndefine &quot;Urine Output&quot;:\r\n  [Observation: &quot;Urine output&quot;] O\r\n    where O.status = 'final'\r\n    and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Current Urine Output&quot;:\r\n  First(&quot;Urine Output&quot; UO where UO.issued same day as Today() sort by issued descending)\r\n\r\ndefine &quot;Net Intake/Output&quot;:\r\n  [Observation: &quot;Net intake/output&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Current Net Intake/Output&quot;:\r\n  First(&quot;Net Intake/Output&quot; IO where IO.issued same day as Today() sort by issued descending)\r\n\r\ndefine &quot;Jugular Venous Pressure&quot;:\r\n  [Observation: &quot;Jugular venous pressure&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Oxygen Saturation&quot;:\r\n  [Observation: &quot;Oxygen saturation&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Potassium&quot;:\r\n  [Observation: &quot;Potassium goal&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;Creatinine&quot;:\r\n  [Observation: &quot;Creatinine in serum&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\ndefine &quot;eGFR&quot;:\r\n  [Observation: &quot;eGFR result&quot;] O\r\n    where O.status = 'final'\r\n      and references(O.encounter, Encounter)\r\n\r\n\r\n// Eligibility Criteria\r\ndefine &quot;Eligibility Criteria&quot;:\r\n  [Condition] C\r\n    where C.code ~ &quot;Congestive heart failure&quot;\r\n      and C.clinicalStatus ~ &quot;Active condition&quot;\r\n      and C.verificationStatus ~ &quot;Confirmed condition&quot;\r\n\r\n// TODO: Handle contained references\r\n// TODO: Handle bundle references\r\n// TODO: Handle remote references\r\ndefine function references(reference Reference, encounter Encounter):\r\n  EndsWith(reference.reference, '/' + encounter.id)\r\n\r\ndefine function referenceTo(encounter Encounter):\r\n  Reference { reference: string { value: 'Encounter/' + encounter.id } }\r\n\r\ndefine function referenceTo(patient Patient):\r\n  Reference { reference: string { value: 'Patient/' + patient.id } }\r\n</code></pre></div>"
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  "version" : "3.0.0",
  "name" : "CHF",
  "title" : "Congestive Heart Failure Logic",
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      "type" : "Observation"
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    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://loinc.org",
              "code" : "9192-6"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://hl7.org/fhir/uv/sdc/CodeSystem/chf-codes",
              "code" : "net-intake-output"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://hl7.org/fhir/uv/sdc/CodeSystem/chf-codes",
              "code" : "jvp"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://loinc.org",
              "code" : "2708-6"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://loinc.org",
              "code" : "86919-8",
              "display" : "Potassium goal [Moles/volume] Serum or Plasma"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://loinc.org",
              "code" : "39802-4",
              "display" : "Creatinine in dialysis fluid/Creatinine in serum or plasma"
            }
          ]
        }
      ]
    },
    {
      "type" : "Observation",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Observation"
      ],
      "codeFilter" : [
        {
          "path" : "code",
          "code" : [
            {
              "system" : "http://hl7.org/fhir/uv/sdc/CodeSystem/chf-codes",
              "code" : "egfr"
            }
          ]
        }
      ]
    },
    {
      "type" : "Condition",
      "profile" : [
        🔗 "http://hl7.org/fhir/StructureDefinition/Condition"
      ]
    }
  ],
  "content" : [
    {
      "contentType" : "text/cql",
      "data" : "library CHF version '1.0.0'

using FHIR version '4.0.1'

include FHIRHelpers version '4.0.1'

codesystem "SNOMED-CT": 'http://snomed.info/sct'
codesystem "LOINC": 'http://loinc.org'
codesystem "CHFCodes": 'http://hl7.org/fhir/uv/cpg/CodeSystem/chf-codes'
codesystem "Condition Clinical Status Code": 'http://terminology.hl7.org/CodeSystem/condition-clinical'
codesystem "Condition Verification Status Code": 'http://terminology.hl7.org/CodeSystem/condition-ver-status'

code "Congestive heart failure": '42343007' from "SNOMED-CT"

code "Body weight": '29463-7' from "LOINC"
code "Body weight change": 'body-weight-change' from "CHFCodes"
code "Urine output": '9192-6' from "LOINC"
code "Net intake/output": 'net-intake-output' from "CHFCodes"
code "Jugular venous pressure": 'jvp' from "CHFCodes"
code "Oxygen saturation": '2708-6' from "LOINC"
code "Potassium goal": '86919-8' from "LOINC" display 'Potassium goal [Moles/volume] Serum or Plasma' // meq/L
code "Creatinine in serum": '39802-4' from "LOINC" display 'Creatinine in serum or plasma' // NOTE: example shows mg/dL, but no LOINC code has those units?
code "eGFR result": 'egfr' from "CHFCodes" // NOTE: Too many to pick from, needs clinical/terminological SME input, in mol/mm/m2

code "Active condition": 'active' from "Condition Clinical Status Code"
code "Provisional condition": 'provisional' from "Condition Verification Status Code"
code "Confirmed condition": 'confirmed' from "Condition Verification Status Code"

parameter Encounter Encounter

context Patient

// Case Features
define "Body Weight":
  [Observation: "Body weight"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Body Weight Change Assertion":
  [Observation: "Body weight change"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Body Weight Change":
  "Daily Body Weight Change" WC
    return Observation {
      id: id { value: Encounter.id + '-bodyweight-change' + ToString(WC.date) },
      extension: {
        Extension {
          url: url { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-instantiatesCaseFeature' },
          value: canonical { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/chf-bodyweight-change' }
        },
        Extension {
          url: url { value: 'http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-caseFeatureType' },
          value: code { value: 'asserted' }
        }
      },
      status: ObservationStatus { value: 'final' },
      code: CodeableConcept {
        coding: {
          Coding {
            system: uri { value: 'http://hl7.org/fhir/uv/cpg/CodeSystem/chf-codes' },
            code: code { value: 'body-weight-change' }
          }
        }
      },
      effective: dateTime { value: WC.date },
      issued: instant { value: Now() },
      subject: referenceTo(Patient),
      encounter: referenceTo(Encounter),
      value: Quantity {
        value: decimal { value: WC.change.value },
        unit: string { value: WC.change.unit },
        system: uri { value: 'http://unitsofmeasure.org' },
        code: code { value: WC.change.unit }
      }
    }

define "Daily Body Weight":
  (expand Encounter.period per day) Date
    let maxWeight: Max("Body Weight" WT where WT.issued same day as Date return WT.value as FHIR.Quantity)
    return { date: Date, weight: maxWeight }

define "Daily Body Weight Change":
  "Daily Body Weight" WT
    let priorWeight: First("Daily Body Weight" PWT where PWT.date < WT.date sort by date descending).weight
    return { date: WT.date, weight: WT.weight, priorWeight: priorWeight, change: WT.weight - priorWeight}

define "Current Body Weight":
  First("Body Weight" WT where WT.issued same day as Today() sort by issued descending)

define "Previous Body Weight":
  First("Body Weight" WT where WT.issued 1 day before day of Today() sort by issued descending)

define "Current Body Weight Change":
  "Current Body Weight".value - "Previous Body Weight".value

define "Urine Output":
  [Observation: "Urine output"] O
    where O.status = 'final'
    and references(O.encounter, Encounter)

define "Current Urine Output":
  First("Urine Output" UO where UO.issued same day as Today() sort by issued descending)

define "Net Intake/Output":
  [Observation: "Net intake/output"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Current Net Intake/Output":
  First("Net Intake/Output" IO where IO.issued same day as Today() sort by issued descending)

define "Jugular Venous Pressure":
  [Observation: "Jugular venous pressure"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Oxygen Saturation":
  [Observation: "Oxygen saturation"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Potassium":
  [Observation: "Potassium goal"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "Creatinine":
  [Observation: "Creatinine in serum"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)

define "eGFR":
  [Observation: "eGFR result"] O
    where O.status = 'final'
      and references(O.encounter, Encounter)


// Eligibility Criteria
define "Eligibility Criteria":
  [Condition] C
    where C.code ~ "Congestive heart failure"
      and C.clinicalStatus ~ "Active condition"
      and C.verificationStatus ~ "Confirmed condition"

// TODO: Handle contained references
// TODO: Handle bundle references
// TODO: Handle remote references
define function references(reference Reference, encounter Encounter):
  EndsWith(reference.reference, '/' + encounter.id)

define function referenceTo(encounter Encounter):
  Reference { reference: string { value: 'Encounter/' + encounter.id } }

define function referenceTo(patient Patient):
  Reference { reference: string { value: 'Patient/' + patient.id } }
"
    }
  ]
}