PaCO2


PARAMETER CASE REPORT FORM RESPONSE OPTIONS
PaCO2 ☐ mm[Hg]

This profile of a FHIR Observation is from the Laboratory Module of the Medical Informatics Initiative (MII). Further information and examples can be found in the MII's Implementation Guide.


This profile of a FHIR Observation is used to capture the carbon dioxide partial pressure (PaCO2).

Observation.code contains three exemplary LOINC codings for PaCO2 in blood, arterial blood or capillary blood.

Observation.valueQuantity has a fixed UCUM-unit of mm[Hg].


Profile - Carbon Dioxide Partial Pressure (PaCO2)

Canonical: https://www.netzwerk-universitaetsmedizin.de/fhir/StructureDefinition/carbon-dioxide-partial-pressure

Snapshot

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statusS Σ ?!1..1codeBinding
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Blood Gas Analysis

The PaCO2 measurement may be part of a blood gas analysis. Thus, there is an additonal profile that can be used for observation grouping.

Observation.code contains three exemplary LOINC codings for gas panel of blood, arterial blood or capillary blood.

Observation.hasMember references the resources that belong to this panel, e.g. pH, PaCO2, PO2 or oxygen saturation.

The LOINC system in Observation.code, i.e. blood, arterial blood, capillary blood, shall match the LOINC system in Observation.code of the member observation.

Snapshot

Canonical: https://www.netzwerk-universitaetsmedizin.de/fhir/StructureDefinition/blood-gas-panel

idΣ0..1string
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textΣ0..1string
systemS Σ1..1uri
valueS Σ1..1string
periodΣ I0..1Period
assignerS Σ I1..1MII-Reference(Organization)
basedOnΣ I0..*Reference(CarePlan | DeviceRequest | ImmunizationRecommendation | MedicationRequest | NutritionOrder | ServiceRequest)
partOfΣ I0..*Reference(MedicationAdministration | MedicationDispense | MedicationStatement | Procedure | Immunization | ImagingStudy)
statusS Σ ?!1..1codeBinding
id0..1string
extensionI0..*Extension
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systemS Σ1..1uriPattern
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codeS Σ1..1codePattern
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systemS Σ1..1uriPattern
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codeS Σ1..1codePattern
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systemS Σ1..1uriPattern
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codeS Σ1..1codePattern
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userSelectedΣ0..1boolean
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subjectS Σ I0..1Reference(Patient | Group | Device | Location)
focusΣ I0..*Reference(Resource)
encounterΣ I0..1Reference(Encounter)
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ageI0..1Range
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hasMemberS Σ I1..*Reference(pH | PaCO2 | PaO2 | Oxygen Saturation | FiO2)
derivedFromΣ I0..*Reference(DocumentReference | ImagingStudy | Media | QuestionnaireResponse | Observation | MolecularSequence)
id0..1string
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valueTimetime
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valuePeriodPeriod
dataAbsentReasonI0..1CodeableConceptBinding
interpretation0..*CodeableConceptBinding
referenceRange0..*see (referenceRange)


Examples

PaCO2 in Arterial Blood
Example observation PaCO2

{
    "resourceType": "Observation",
    "id": "carbon-dioxide-partial-pressure",
    "meta": {
        "profile":  [
            "https://www.netzwerk-universitaetsmedizin.de/fhir/StructureDefinition/carbon-dioxide-partial-pressure"
        ]
    },
    "identifier":  [
        {
            "type": {
                "coding":  [
                    {
                        "system": "http://terminology.hl7.org/CodeSystem/v2-0203",
                        "code": "OBI"
                    }
                ]
            },
            "system": "https://www.charite.de/fhir/CodeSystem/lab-identifiers",
            "value": "2019-8_paCO2",
            "assigner": {
                "reference": "Organization/Charité"
            }
        }
    ],
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://loinc.org",
                    "code": "26436-6"
                },
                {
                    "system": "http://terminology.hl7.org/CodeSystem/observation-category",
                    "code": "laboratory"
                },
                {
                    "code": "18767-4",
                    "system": "http://loinc.org"
                }
            ]
        }
    ],
    "valueQuantity": {
        "system": "http://unitsofmeasure.org",
        "code": "mm[Hg]",
        "value": 44,
        "unit": "mmHg"
    },
    "status": "final",
    "code": {
        "coding":  [
            {
                "code": "2019-8",
                "system": "http://loinc.org",
                "display": "Carbon dioxide [Partial pressure] in Arterial blood"
            }
        ],
        "text": "Carbon dioxide [Partial pressure] in Arterial blood"
    },
    "subject": {
        "reference": "Patient/gecco-patient"
    },
    "effectiveDateTime": "2020-09-21"
}


Gas Panel Arterial Blood
This observation can be part of a gas panel via the hasMember element.

{
    "resourceType": "Observation",
    "id": "blood-gas-panel-arterial",
    "meta": {
        "profile":  [
            "https://www.netzwerk-universitaetsmedizin.de/fhir/StructureDefinition/blood-gas-panel"
        ]
    },
    "identifier":  [
        {
            "type": {
                "coding":  [
                    {
                        "system": "http://terminology.hl7.org/CodeSystem/v2-0203",
                        "code": "OBI"
                    }
                ]
            },
            "system": "https://www.charite.de/fhir/CodeSystem/lab-identifiers",
            "value": "24336-0_gasPanelBldA",
            "assigner": {
                "reference": "Organization/Charité"
            }
        }
    ],
    "category":  [
        {
            "coding":  [
                {
                    "system": "http://loinc.org",
                    "code": "26436-6"
                },
                {
                    "system": "http://terminology.hl7.org/CodeSystem/observation-category",
                    "code": "laboratory"
                },
                {
                    "system": "http://loinc.org",
                    "code": "18767-4"
                }
            ]
        }
    ],
    "status": "final",
    "code": {
        "coding":  [
            {
                "code": "24336-0",
                "system": "http://loinc.org",
                "display": "Gas panel - Arterial blood"
            }
        ],
        "text": "Gas panel - Arterial blood"
    },
    "subject": {
        "reference": "Patient/gecco-patient"
    },
    "effectiveDateTime": "2020-09-21",
    "hasMember":  [
        {
            "reference": "Observation/pH-arterial"
        },
        {
            "reference": "Observation/carbon-dioxide-partial-pressure"
        },
        {
            "reference": "Observation/oxygen-partial-pressure"
        },
        {
            "reference": "Observation/oxygen-saturation"
        },
        {
            "reference": "Observation/inhaled-oxygen-concentration"
        }
    ]
}