Smartwatch oxygen sensor put to the test in Low-Oxygen conditions
NCT ID NCT04380389
First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study tested how accurately the Withings ScanWatch measures blood oxygen levels during very low oxygen conditions. Fourteen healthy adults had their oxygen levels briefly lowered while the watch's readings were compared to a standard blood test. The goal was to see if the watch meets official accuracy standards for pulse oximeters.
What this could mean
Our plain-language read of the trial. This is informational only — not medical advice or a prediction.
- What this could lead to
- If successful, this could confirm that the ScanWatch reliably measures blood oxygen levels, potentially helping people monitor respiratory conditions at home.
- What could go wrong
- This was a very small study (14 people) in healthy volunteers, not patients. Real-world performance may differ, and the device is not a substitute for medical-grade monitoring.
This is an AI summary of the original study and may miss details. Read our disclaimer.
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As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Hypoxia Lab, UCSF
San Francisco, California, 94133, United States