Apparatus and method for enhancing and analyzing signals from a continuous non-invasive blood pressure device
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United States of America Patent
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Aug 26, 2014
Grant Date -
May 5, 2011
app pub date -
Oct 29, 2010
filing date -
Oct 29, 2009
priority date (Note) -
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Abstract
A system and method of enhancing a blood pressure signal is disclosed. The volume of an artery in a finger is measured by a photo-plesthysmographic (PPG) system, which produces a PPG signal. This PPG system is placed inside a cuff, and the cuff pressure is controlled by the PPG signal. The portion or component of the PPG signal having a frequency higher than a predefined threshold frequency is then modified or enhanced, such as by multiplying the high frequency component by a calibration factor. A blood pressure signal is then calculated using the cuff pressure and the modified PPG signal. A blood pressure contour curve may then be generated, and a variety of parameters may be calculated using the curve.
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