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.
Disclaimer
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Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
This is a summary of the original study . Summaries may miss details or leave out important information. Before applying or accepting participation, make sure you have read and understood the full study. Curemydisease.com takes no responsibility whatsoever for anything missed, misunderstood, or acted upon as a result of our summary — we know it does not capture everything.
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The condition terms exactly as the trial's registrant entered them.
Contacts and locations
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Locations
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Hypoxia Lab, UCSF
San Francisco, California, 94133, United States