Method and apparatus for removing artifact from physiological signals
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United States of America Patent
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Oct 26, 1999
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app pub date -
Oct 17, 1997
filing date -
Oct 17, 1997
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Abstract
A heart rate value determined from a first physiological signal that is acquired independently from a second physiological signal, is used to control a band pass filter for controllably bandpass filtering the second physiological signal. In a system having sensors for independently acquiring both electrocardiogram (ECG) and pulse oximetry (SpO2) signals, a heart rate value determined from the ECG signal is used to controllably bandpass filter the red and infrared SpO2 signals, thereby reducing the level of artifact signal in the SpO2 signals.
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