Patent ID: 11931147
Assignee: APPLE INC.
Field: Medical technology (Instruments)
Classification: CPC A | IPC A

Claim 17:
18. A non-transitory computer readable storage medium storing instructions, which when executed by one or more processors, cause the one or more processors to perform a method, the method comprising:
measuring physiological signals including a first physiological signal at a first wavelength, a second physiological signal at a second wavelength and a third physiological signal at a third wavelength;
determining whether one or more criteria are met for the physiological signals, the one or more criteria including a criterion based on the third physiological signal at the third wavelength; and
in accordance with the determination that the one or more criteria are met for the physiological signals, estimating a physiological characteristic using the first physiological signal at the first wavelength and the second physiological signal at the second wavelength, without using the third physiological signal at the third wavelength.