Futurity September 20, 2022
A new proof-of-principle study shows a smartphone’s camera and flash can detect blood oxygen saturation levels down to 70%.
That’s the lowest value that pulse oximeters should be able to measure, as recommended by the US Food and Drug Administration.
When we breathe in, our lungs fill with oxygen, which is distributed to our red blood cells for transportation throughout our bodies. Our bodies need a lot of oxygen to function, and healthy people have at least 95% oxygen saturation all the time.
Conditions like asthma or COVID-19 make it harder for bodies to absorb oxygen from the lungs. This leads to oxygen saturation percentages that drop to 90% or below, an indication that medical attention is needed.
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