The Evidence Behind Camera-Based Vitals

Published 2026-07-14 · Updated 2026-07-14

Camera-based vitals are backed by published research. NervoScan's approach has been developed through research with Singapore General Hospital and the National University Health System, with heart rate agreement of about 2 bpm and blood oxygen about 2 percent. The blood-pressure method was peer-reviewed in JMIR Formative Research (2025). These are wellness estimates, not a diagnosis.

The research

NervoScan's blood-pressure estimation method was studied with Singapore General Hospital and published in JMIR Formative Research in 2025. The study looked at how closely camera-based blood-pressure estimates matched reference measurements across a patient cohort. You can read the paper at JMIR Formative Research (2025). Heart-rate and blood-oxygen accuracy come from Nervotec's broader research with SGH and the National University Health System (NUHS).

What the numbers mean

In SGH and NUHS research, heart rate agreement was about 2 bpm and blood oxygen about 2 percent. Numbers like these describe agreement under research conditions. Everyday results depend on lighting, movement, and the quality of the video.

Why we call it wellness, not a diagnosis

We are careful with language on purpose. NervoScan gives a wellness reading. It does not detect, treat, or prevent any condition, and it does not replace a clinician. Honest framing is part of how we build trust.

For the skeptic

It is fair to be cautious about health apps. Our answer is evidence and honesty: a peer-reviewed study, clear accuracy framing, and a clear statement of what the tool is not. To understand the method, start with what rPPG is.