Systems and methods for determining blood oxygen saturation values using complex number encoding
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United States of America Patent
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Oct 21, 2008
Grant Date -
Apr 13, 2006
app pub date -
Nov 28, 2005
filing date -
Dec 4, 2002
priority date (Note) -
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Abstract
The disclosure includes pulse oximetry systems and methods for determining point-by-point saturation values by encoding photoplethysmographs in the complex domain and processing the complex signals. The systems filter motion artifacts and other noise using a variety of techniques, including statistical analysis such as correlation, or phase filtering.
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