Method for enhancing pulse oximetry calculations in the presence of correlated artifacts
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United States of America Patent
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Aug 26, 2014
Grant Date -
Aug 22, 2013
app pub date -
Mar 28, 2013
filing date -
Mar 3, 2005
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Abstract
Methods and systems for determining a physiological parameter in the presence of correlated artifact are provided. One method includes receiving two waveforms corresponding to two different wavelengths of light from a patient. Each of the two waveforms includes a correlated artifact. The method also includes combining the two waveforms to form a plurality of weighted difference waveforms, wherein the plurality of weighted difference waveforms vary from one another by a value of a multiplier. The method further includes identifying one of the weighted difference waveforms from the plurality of weighted difference waveforms using a characteristic of one or more of the plurality of weighted difference waveforms and determining a characteristic of the correlated artifact based at least in part on the identified weighted difference waveform.
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