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Methods and systems for power optimization in a medical device

  • US 9,538,961 B2
  • Filed: 02/27/2015
  • Issued: 01/10/2017
  • Est. Priority Date: 05/31/2012
  • Status: Active Grant
First Claim
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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.

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