Observation Profile¶
| Canonical | https://fhir.apps.health/StructureDefinition/nexus-emr-core-observation |
|---|---|
| Status | draft · 1.25.1 |
| Base | Observation (constraint) |
| Source | FSH · JSON |
Nexus EMR profile for the Observation resource, based on CA-Core. Represents measurements, tests, and simple assertions originating from source EMRs for aggregation.
Overview
Overview
The Nexus EMR Core Observation profile represents measurements, findings, and clinical results within primary care EMR systems. This profile supports a wide range of observations including vital signs, laboratory results, clinical assessments, and survey responses across the Nexus EMR ecosystem.
Key Features
- Flexible Value Types: Supports numeric, coded, text, boolean, and complex result types
- LOINC Integration: Preferred coding system with fallback to source EMR codes
- Component Support: Handles multi-part observations like blood pressure
- Reference Ranges: Includes normal ranges for result interpretation
- Status Tracking: Distinguishes preliminary, final, and corrected results
Clinical Categories
Common observation types include:
- Vital Signs: Blood pressure, temperature, pulse, respirations, oxygen saturation
- Laboratory: Chemistry panels, hematology, microbiology results
- Imaging: Radiology and imaging findings
- Survey: Patient questionnaires and assessments
- Exam: Physical examination findings
- Social History: Smoking status, exercise, substance use
Result Interpretation
The profile supports:
- Categorical interpretations (high, low, normal, critical)
- Reference ranges with age and gender specificity
- Abnormal flags and clinical alerts
- Trending and historical comparisons
Terminology bindings
| Path | Strength | Value set |
|---|---|---|
Observation.status |
required | observation-status |
Observation.category |
required | observation-category |
Observation.interpretation |
extensible | observation-interpretation |