A - Human Necessities – 61 – M
Patent
A - Human Necessities
61
M
A61M 5/14 (2006.01) G06F 17/00 (2006.01)
Patent
CA 2176633
A technique for the accurate determination of artifact free pulse oximetry signals utilizes an adaptive signal processor and peak detector circuit. A reference signal for the adaptive signal processor is derived based on mathematical relations of the detected light signals and the true intensity of light signals. The derivation of the appropriate reference signal requires the determination of peak values for two ratio constants. The two ratio constants lie within a known physiological range of values. When the value of the ratio constants has been determined, the reference signal equals the true intensity. The output of the adaptive signal processor is provided to the peak detector. The peak detector subdivides the known physiological range into two intervals and determines in which interval a peak exists. The remaining interval is discarded, and the peak detector repeats the measurement on the remaining interval until a peak has been detected within the desired accuracy. The value corresponding to the detected peak is one of the ratio constants. In a second alternative embodiment, the output of the adaptive filter is fed directly to the peak detector to determine values for the two ratio constants. In yet a third embodiment, two adaptive signal processors are coupled to a ratio processor. The output of the ratio processor is at a minimum when the appropriate value is selected for each of the two ratio constants.
Oyen Wiggs Green & Mutala Llp
Spacelabs Medical Inc.
LandOfFree
System and method for the extractment of physiological signals does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with System and method for the extractment of physiological signals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System and method for the extractment of physiological signals will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1647194