Pulse oximetry signal correction using near infrared absorption by water
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United States of America Patent
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May 8, 2012
Grant Date -
May 10, 2007
app pub date -
Sep 15, 2006
filing date -
Mar 9, 2004
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Abstract
A method and system for measuring a physiological parameter, comprising collecting a first absorbance at a first wavelength, chosen to be primarily absorbed by water; collecting a second absorbance at a second wavelength, chosen to be primarily absorbed by hemoglobin; and combining the first signal and the second signal to generate a combined plethysmograph signal which is proportionate lower in noise caused by motion-related interference.
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