SENTINELSee the episode
before it speaks.
Sentinel reads cortisol spikes, heart-rate variability, and galvanic skin response in real time — translating the invisible architecture of a PTSD episode into data a clinician can act on sixty seconds before the patient finds words.
Validated across 340 veteran patients · 12 VA medical centers
Three signals. One wrist. Real time.
What it physically measures on skin.
The Sentinel biosensor makes continuous contact with the ventral wrist — the most information-rich surface for sympathetic nervous system monitoring. Three independent sensor arrays capture HRV via photoplethysmography, galvanic skin response via electrodermal activity electrodes, and a cortisol proxy via thermoregulatory shift detection. Sampling at 250 Hz, the device captures physiological events that precede verbal disclosure by minutes.
Three inputs. One clinical-grade index.
How biosignals fuse into actionable data.
Raw biosignals are noisy. Individual spikes are ambiguous. Sentinel's Bayesian fusion engine weighs HRV, electrodermal activity, and cortisol-proxy data in real time, producing a single Clinical Stress Index™ validated against gold-standard laboratory cortisol assays (r=0.91, p<0.001). The index updates every 4 seconds. When it crosses a patient-specific threshold, the clinician receives an alert within 60 seconds — before the patient has found words for what is happening.
What your dashboard shows sixty seconds after a spike.
Built for the clinical workflow, not against it.
The Sentinel clinician dashboard surfaces the Clinical Stress Index alongside a timestamped event log, session waveform, and alert history — accessible on any device with a browser. During an EMDR session, the therapist sees biometric confirmation of desensitization in real time. For VA psychiatrists managing caseloads of sixty, the dashboard flags which patients are approaching threshold before the next appointment. No new hardware. No new login. Integrates with Epic and Cerner via HL7 FHIR.
Twelve weeks of data. Seventy percent fewer episodes.
Redacted but real. Peer-reviewed. Replicable.
In a 127-patient longitudinal study across 12 VA medical centers, patients wearing Sentinel and whose clinicians received real-time index alerts showed a 70% reduction in self-reported PTSD episode frequency by week twelve. The mechanism: earlier intervention during the physiological prodrome, before the episode reaches full expression. The data is available in the full clinical validation whitepaper — twelve pages, peer-reviewed, with complete methodology.
Download the
12-Page Whitepaper
Peer-reviewed validation data from a 340-patient VA study. Includes methodology, sensor accuracy benchmarks, and twelve-week episode-reduction outcomes.
See Sentinel
on a wrist.
A 30-minute session with a clinical implementation specialist. We walk through the full data pipeline — sensor to dashboard — using live biometric data from a demonstration device.