Locating features in a photoplethysmograph signal
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United States of America Patent
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Issued Date -
Jan 6, 2005
app pub date -
Mar 24, 2004
filing date -
Sep 28, 2001
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A method and apparatus for locating a feature in a photoplethysmograph or blood pressure signal, comprising a series of signal complexes each having a principal peak (or equivalent trough), is disclosed. The signal is processed to identify a reference point on the upslope of a principal peak. The signal is then searched for the feature in the vicinity of the reference point.
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