1. Capture
Patients enter readings manually or from connected devices. Entries are timestamped and validated for expected ranges.
What BP 4DAT Does
BP 4DAT helps veterans and care teams track blood pressure values in one consistent workflow. The app focuses on three things: capturing accurate data, making trends understandable, and preparing records for trusted handoff.
- Fast daily logging (systolic, diastolic, pulse, notes).
- Trend views that flag sustained high/low periods.
- Data packaging for external transfer and reporting.
2. Understand
Readings are grouped into daily and weekly summaries so patients can quickly see whether treatment is stabilizing blood pressure.
3. Transfer
Data can be prepared for healthcare partners, including a dedicated placeholder for VA system integration.
VA Transfer API Placeholder
This endpoint is a placeholder contract for moving BP 4DAT records to a VA integration layer. Wire this to your secure backend when ready.
{
"veteran_id": "string",
"source_app": "BP4DAT",
"readings": [
{
"recorded_at": "2026-04-04T08:15:00Z",
"systolic": 128,
"diastolic": 82,
"pulse": 70,
"notes": "Morning reading"
}
],
"consent": {
"granted": true,
"granted_at": "2026-04-04T08:10:00Z"
}
}Current VA FHIR Upload Reality
As of April 4, 2026, VA's external Patient Health API (FHIR) supports reading observations, including vital signs, but does not expose an external Observation write endpoint for third-party apps.
- Patient Health API (external): Observation is read-only (`GET`).
- Clinical Health API includes `POST /DocumentReference`, but that API is marked internal-only.
- BP 4DAT route today: collect BP data in app, then hand off through `POST /api/v1/va/transfer` to your integration layer.
This section should be reviewed whenever VA API capabilities change.
LOINC Mapping And Photo Verification
BP 4DAT maps blood pressure captures to LOINC panel
35094-2 and device metadata panel
43152-8.
| Field | LOINC | Default / Answer IDs |
|---|---|---|
| Blood pressure panel | 35094-2 |
Parent panel for BP capture |
| Systolic blood pressure | 8480-6 |
Measured value in mm[Hg] |
| Diastolic blood pressure | 8462-4 |
Measured value in mm[Hg] |
| Blood pressure device type | 41901-0 |
Example IDs from LL3624-5 |
| Blood pressure measurement site | 41904-4 |
Example IDs from LL718-8 |
Sources: LOINC 35094-2 and LOINC 43152-8 panel details.
Future Expansion Panels
These can be added as additional BP 4DAT features or launched as standalone companion apps.
LOINC 34566-0
Vital signs with method details panel
LOINC 34565-2
Vital signs, weight and height panel