Normal Ranges Most people have a normal resting pulse oximetry reading for oxygen saturation (SpO2) between 95% and 100%. This shows that your blood has an appropriate amount of oxygen.

Every time you go to the doctor, the first thing they do is check your vital signs. These four initial tests measure the ...

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Conversely, if a device isn’t taking readings properly, a seemingly normal SpO2 rating might belie other underlying problems and give wearers a false sense of security.

SpO2 sensors, which enable blood oxygen monitoring, were one of the marquee upgrades when Oura announced its third-generation smart ring.