Blood Pressure

The Science

How Cuffless BP Works

Blood pressure affects how blood flows through arteries and capillaries. In supported configurations, Circadify analyzes pulse wave shape and timing visible in facial video to produce systolic and diastolic trend values.

What We Analyze

✓Pulse wave velocity and shape
✓Pulse transit time variations
✓Waveform morphology features
✓Heart rate variability correlations

Best Practices for Accuracy

✓
Sit quietly for 5 minutes before measuring
✓
Avoid caffeine/alcohol for 30 minutes
✓
Sit with back supported, feet flat
✓
Calibrate periodically with a cuff

Ideal Use Cases

Daily BP Trending

Track blood pressure patterns between traditional cuff measurements.

Telehealth Context

Add BP trend indicators during virtual visits when enabled for the deployment.

Follow-Up Support

Highlight trends that may warrant confirmation with a traditional measurement.

Population Programs

Support large-scale wellness or research check-ins without deploying physical equipment to every user.

Blood Pressure Monitoring FAQ

Common questions about contactless BP trends

How can you measure blood pressure without a cuff?

rPPG technology analyzes pulse-wave patterns visible in facial video. In supported configurations, Circadify uses those signal features to produce blood pressure trend outputs that should be evaluated against the deployment's intended use and validation plan.

How accurate is contactless blood pressure?

Accuracy depends on the device, lighting, motion, population, calibration approach, and model configuration. BP outputs should be confirmed with a validated cuff where clinical decisions require a blood pressure measurement.

Can I replace my blood pressure cuff with this?

No. Circadify BP outputs are designed to add trend context and remote check-in support, not to replace a validated cuff or clinician-directed measurement workflow.

What factors affect contactless BP accuracy?

Accuracy can be affected by recent exercise, caffeine intake, posture, motion, lighting, device quality, and calibration. For best results, sit quietly before scanning and compare against reference measurements during validation.

Is this FDA cleared for blood pressure monitoring?

Circadify should not be presented as an FDA-cleared blood pressure monitor unless a cleared configuration is explicitly supplied for that use. Teams should use BP outputs only within their approved validation, compliance, and intended-use boundaries.

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