WristO2: Reliable Peripheral Oxygen Saturation Readings from Wrist-Worn Pulse Oximeters

Peripheral blood oxygen saturation (SpO2) is a vital health signal with many clinical applications. Modern wrist-worn devices, such as the Apple Watch, FitBit, and Samsung Gear, have pulse oximeter sensors, making them theoretically capable of measuring SpO2. However, current techniques for SpO2 measurements using pulse oximeter sensors are based on readings taken from the fingertip. Readings coll...