Covid: How a £20 gadget could save lives - BBC News
Pulse oximetry: Uses and benefits
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Pulse Oximeter: What It Measures, How It Works, and How to Read It
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Doctors Warn FDA of Risks Posed by Flawed Oxygen Devices - The New York Times
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Why inaccuracies with pulse oximeters were ignored for so long
Device used to measure blood oxygen can give misleading information to Black patients, study finds
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Can an Oximeter Help Detect COVID-19 at Home? | Houston Methodist On Health
Pulse Oximetry > Fact Sheets > Yale Medicine
