BLE-AoA vs UWB for healthcare RTLS — which fits.
BLE-AoA and UWB are the two leading RTLS technologies for hospital deployments — clinical workflow, infant protection, hand-hygiene compliance, asset finding, patient elopement prevention.
The accuracy needed varies dramatically by use case, and the right choice is rarely "the more accurate one". This is the operator-level comparison for clinical engineering and IT teams choosing between them.
The accuracy hierarchy in healthcare
Hospital use cases stack at different accuracy tiers. Room-level: asset finding, broad workflow attribution, patient location for billing. Bed-level: infant protection, equipment association with patient, fall prevention, medication-administration record matching.
Sub-decimetre: hand-hygiene compliance with confirmed point-of-care attribution, surgical-instrument tracking. UWB delivers all three. BLE-AoA delivers room and bed comfortably; sub-decimetre is harder but possible in dense deployments.
Tag battery management — the operational deciding factor
Hospitals have hundreds to thousands of tagged staff, patients, beds and assets. BLE-AoA tags: 2–5 years on a coin cell. UWB tags: months to two years depending on update rate.
For a hospital fleet of 3,000 active tags, BLE-AoA's longer battery life reduces operational burden by 10× or more. Many large hospitals reject UWB on operational-overhead grounds even when accuracy is competitive.
Use-case fit
BLE-AoA wins: most asset tracking; clinical workflow attribution; bed-level infant protection (Quuppa-based systems are mainstream); broad hand-hygiene at room-level; equipment-utilisation analytics.
UWB wins: sub-decimetre hand-hygiene with confirmed point-of-care; surgical-instrument tracking; critical-care patient location with millisecond latency; high-density labour-and-delivery infant tagging.
Most hospital deployments mix both — UWB in the few zones that need it, BLE-AoA everywhere else.
Vendor landscape in healthcare
BLE-AoA / multi-tech healthcare RTLS: Quuppa (BLE-AoA underlay), CenTrak (multi-tech: low-frequency RF + BLE + Wi-Fi; market leader in hospital RTLS), Stanley AeroScout (Wi-Fi based, healthcare-specific), Sonitor (ultrasound for bed-level certainty), Midmark RTLS.
UWB healthcare: BeWhere, Sewio (industrial-leaning but used in hospitals), Decawave-platform vendors. Most large hospital RTLS deployments are CenTrak or Stanley AeroScout for the broad footprint, with UWB or ultrasound for the few zones needing sub-decimetre.
EMR and clinical integration
Both ecosystems integrate into Epic, Cerner / Oracle Health, Meditech, Allscripts via standard interfaces (HL7 v2, FHIR, vendor-specific APIs).
Clinical workflow attribution ("who saw which patient when") requires correlating tag events with appointment data — the integration architecture matters more than the underlying radio.
We design integration in stage 1 — see /integrations/epic and /integrations/cerner-oracle-health.
Where TRACIO recommends each
Default to BLE-AoA for new hospital RTLS deployments where broad coverage matters: asset finding, workflow, infant protection, room-level hand hygiene. The operational advantage of multi-year battery life is decisive at hospital scale.
Add UWB in specific zones where sub-decimetre accuracy is non-negotiable: high-acuity hand hygiene with confirmed POC, surgical-instrument tracking, critical-care location.
Consider multi-tech RTLS (CenTrak, Stanley AeroScout) when you want a single platform vendor covering the full breadth — accepting that no single radio does everything optimally.
Frequently asked questions
Which is better for infant protection — BLE-AoA or UWB?
Both work. BLE-AoA-based Quuppa solutions are mainstream. UWB pulls ahead in very dense labour-and-delivery units where sub-decimetre certainty at the bed level matters. Most deployments are BLE-AoA.
Will my existing Wi-Fi APs work for RTLS?
Most hospital Wi-Fi (Cisco, Aruba) supports BLE positioning at room level — not sub-metre AoA. Sub-metre needs purpose-built BLE-AoA Locators (Quuppa) or upgraded AP models. We size the right architecture in stage 1.
Does CenTrak use BLE-AoA or UWB?
CenTrak uses a proprietary multi-tech stack — low-frequency RF for certainty, BLE and Wi-Fi for broader visibility. It's neither purely BLE-AoA nor UWB, but a hospital-optimised hybrid.
How does this integrate with our EMR (Epic / Cerner)?
Through HL7 v2 / FHIR and vendor-specific APIs into Epic Rover and Cerner location services. We design EMR integration in stage 1 — see /integrations/epic and /integrations/cerner-oracle-health.
What's the right deployment sequence?
Typically: phase 1, broad RTLS coverage (BLE-AoA or multi-tech) for asset finding and workflow; phase 2, add high-acuity zones (UWB or ultrasound) for hand-hygiene attribution, infant protection, surgical-instrument tracking. We define phases in stage 1 of /method.
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