Method, apparatus and system for removing motion artifacts...

Details Method, apparatus and system for removing motion artifacts... Method, apparatus and system for removing motion artifacts...

2006-07-04

2006-07-04

Winakur, Eric F. (Department: 3735)

Surgery

Diagnostic testing

Measuring or detecting nonradioactive constituent of body...

C600S323000, C600S324000

Reexamination Certificate

active

07072702

ABSTRACT:
A method for removing motion artifacts from devices for sensing bodily parameters and apparatus and system for effecting same. The method includes analyzing segments of measured data representing bodily parameters and possibly noise from motion artifacts. Each segment of measured data may correspond to a single light signal transmitted and detected after transmission or reflection through bodily tissue. Each data segment is frequency analyzed to determine up to three candidate peaks for further analysis. Each of the up to three candidate frequencies may be filtered and various parameters associated with each of the up to three candidate frequencies are calculated. The best frequency, if one exists, is determined by arbitrating the candidate frequencies using the calculated parameters according to predefined criteria. If a best frequency is found, a pulse rate and SPO2may be output. If a best frequency is not found, other, conventional techniques for calculating pulse rate and SpO2may be used. The above method may be applied to red and infrared pulse oximetry signals prior to calculating pulse rate and/or pulsatile blood oxygen concentration. Apparatus and systems disclosed are configured to perform methods disclosed according to the invention.

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