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VENOUS OXYGEN SATURATION SYSTEMS AND METHODS

  • US 20130066175A1
  • Filed: 09/09/2011
  • Published: 03/14/2013
  • Est. Priority Date: 09/09/2011
  • Status: Abandoned Application
First Claim
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1. A method for determining a subject'"'"'s physiological condition, comprising:

  • obtaining a first photoplethysmographic signal from the subject, based on light transmission at a first wavelength, and removing a pulsatile component from the first signal to create a first filtered signal indicative of a first baseline modulation;

    obtaining a second photoplethysmographic signal from the subject, based on light transmission at a second wavelength, and removing a pulsatile component from the second signal to create a second filtered signal indicative of a second baseline modulation;

    determining a first ratio that includes an amplitude of the first filtered signal divided by a first numeric component;

    determining a second ratio that includes an amplitude of the second filtered signal divided by a second numeric component; and

    dividing the first ratio by the second ratio to create a ratio of ratios indicative of the subject'"'"'s physiological condition.

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