Method and apparatus for determining physiological characteristics
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United States of America Patent
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-
Jul 15, 2003
Grant Date -
Nov 1, 2001
app pub date -
Mar 23, 2001
filing date -
Mar 29, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for determining physiological characteristics comprising the steps of (a) acquiring a first blood oxygen signal from a subject, the blood oxygen signal having an undesirable artifact signal component; (b) acquiring an additional physiological signal having a heart rate component using an acquisition technique that is different and independent from the first acquiring step; (c) processing the first blood oxygen signal and the physiological signal to provide a first waveform having a reduced level of the artifact signal component therein; (d) processing the first waveform and the physiological signal to provide a reference waveform; and (e) processing the reference waveform and the physiological signal to provide a second blood oxygen saturation signal corresponding to the blood oxygen saturation level of said subject.
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