Patent ID: 7328053
Filing Date: 2008-02-05
Classification: A61B,G01N,G06K,H04B

Abstract:
1. A system for the enhancement of physiological signals for the measurement of blood oxygen in a subject, the system comprising: first and second light sources to direct light toward the subject, said first and second light sources producing light of first and second wavelengths, respectively; a light detector positioned to detect said first and second light signals after interaction with the subject and to generate first and second signals indicative of an intensity of said first and second detected light signals, respectively, said first generated signal having a first portion arising from light transmitted from said first source and a second portion arising from a first interference source, said second generated signal having a first portion arising from light transmitted from said second source and a second portion arising from a second interference source; a packet generator to generate a plurality of data packets derived from data comprising said first and second generated signals; wherein said first and second portions of said first and second generated signals and a ratio of said first portion of said first generated signal to said first portion of said second generated signal have a mathematical relationship; and a calculator using said mathematical relationship to generate at least first and second functions from said plurality of data packets, said at least first and second functions having a final solution value indicative of said ratio.