05503148 is referenced by 201 patents and cites 12 patents.

The improved pulse oximeter preprocesses the sets of red and infrared signals received from the probe. The set of pairs of processed red and infrared data points are fitted to a linear equation to compute the slope of the best fit line through these data points and account for noise in both of these sets of data points. A measure of the linearity of the input data points, if less than a predetermined threshold, indicates that a distorted signal has been received from the probe. The computed slope of the best fit line is converted to a RRatio which is used in a empirical calibration formula to compute the average SpO.sub.2 value.

Title
System for pulse oximetry SPO.sub.2 determination
Application Number
8/332972
Publication Number
5503148
Application Date
November 1, 1994
Publication Date
April 2, 1996
Inventor
David W Trumble
Boulder
CO, US
Jonas A Pologe
Boulder
CO, US
Agent
James M Graziano
Larry R Cassett
Roger M Rathbun
Assignee
Ohmeda
NJ, US
IPC
A61B 5/00
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