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Branch-scoped Care devices with hashed agent tokens, patient barcode lookup/labels, and provenance-aware vitals from a minimal device agent (Pro for agent hardware; wedge free). Co-authored-by: Cursor <cursoragent@cursor.com>
92 lines
3.1 KiB
Markdown
92 lines
3.1 KiB
Markdown
# Care clinical devices
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Ladill Care supports two realistic hardware paths:
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| Device | Connection | Plan |
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|--------|------------|------|
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| USB barcode / QR scanner | **Browser keyboard wedge** — scan into Patients or Lab | All plans |
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| Badge / label printer | Browser print CSS (patient ID label) | All plans |
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| Thermometer, BP monitor, pulse ox, scale, lab analyzer | **Care Device Agent** (local machine) | Pro / Enterprise |
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Browser pages cannot open serial ports or most BLE clinical devices without a local helper. The agent holds the vendor/serial connection and posts readings to Care with a device token.
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## Device registry
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**Settings → Devices** (hospital admin):
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1. Register a device (branch-scoped).
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2. For agent types, Care shows a **plaintext token once** (create / regenerate). The DB stores only `device_token_hash`.
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3. Status updates from agent heartbeats (`active` + `last_seen_at`).
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## Browser wedge (patients)
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1. Open **Patients**.
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2. Focus the scan field (or scan while not typing in another input).
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3. Scan a patient ID label (`patient_number`) → Care opens the patient record.
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4. From the patient page, **Print ID label** for browser print.
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Lab **Collect sample** accepts a scanned `sample_barcode` before submit.
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## Agent API
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Base URL: `{APP_URL}/api/v1/device-agent`
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Auth (any one):
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- Header `X-Care-Device-Token: <plaintext token>`
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- Header `Authorization: Bearer <plaintext token>`
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- Header `X-Device-Token: <plaintext token>` (compat)
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Rate limit: 60 requests / minute / token.
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### Heartbeat
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```bash
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curl -sS -X POST "$CARE_URL/api/v1/device-agent/heartbeat" \
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-H "X-Care-Device-Token: $DEVICE_TOKEN" \
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-H "Content-Type: application/json" \
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-H "Accept: application/json" \
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-d '{"agent_version":"0.1.0","hostname":"nurse-station-1"}'
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```
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### Post vitals
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Provide `consultation_uuid` **or** `visit_uuid` (latest consultation on that visit). Readings create a `care_vital_signs` row with `source=device` and `device_id`.
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```bash
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curl -sS -X POST "$CARE_URL/api/v1/device-agent/vitals" \
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-H "X-Care-Device-Token: $DEVICE_TOKEN" \
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-H "Content-Type: application/json" \
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-H "Accept: application/json" \
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-d '{
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"consultation_uuid":"'"$CONSULTATION_UUID"'",
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"vitals":{"temperature":36.8,"pulse":72,"spo2":98},
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"raw":{"driver":"stub","unit":"C"}
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}'
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```
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Typed consultation vitals remain the source of truth for clinicians; agent posts append provenance-aware rows.
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### Collect sample barcode
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```bash
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curl -sS -X POST "$CARE_URL/api/v1/device-agent/samples/collect" \
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-H "X-Care-Device-Token: $DEVICE_TOKEN" \
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-H "Content-Type: application/json" \
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-H "Accept: application/json" \
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-d '{"investigation_uuid":"'"$INVESTIGATION_UUID"'","sample_barcode":"SMP-001"}'
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```
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## Minimal agent (demo)
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See `deployment/care-device-agent/`.
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```bash
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cd deployment/care-device-agent
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cp .env.example .env # set CARE_URL + DEVICE_TOKEN
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npm install # optional; Node 18+ has fetch built-in
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FAKE_READING=1 npm start
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```
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With `FAKE_READING=1` the agent heartbeats and posts a stub temperature every interval (no serial hardware). Point `CONSULTATION_UUID` at an open consultation for a live demo.
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