Patent ID: 9538961
Date: 2017-01-10
CPC Classifications: A61B

Claim:
1. A method of operating a physiological monitor, the method comprising: generating a first light drive signal for activating a first light source to emit a first photonic signal of a first wavelength of light, wherein the first light drive signal is in an “on” state for a plurality of consecutive physiological pulses; receiving a first light signal attenuated by a subject, wherein the first light signal comprises a first component corresponding to the first photonic signal; determining, using a processor, when to activate a second light source based on the first component; generating, when it is determined to activate the second light source, a second light drive signal for activating the second light source to emit a second photonic signal of a second wavelength of light, wherein the second light drive signal is in an “off” state during at least one portion of each of the plurality of consecutive physiological pulses; receiving a second light signal attenuated by the subject, wherein the second light signal comprises a second component corresponding to the second photonic signal; and determining, using the processor, a physiological parameter of the subject based on the first and second components of the respective first and second received light signals.