Calibration of pulse transit time measurements to arterial blood pressure using external arterial pressure applied along the pulse transit path
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United States of America Patent
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Nov 20, 2012
Grant Date -
Sep 23, 2010
app pub date -
Mar 20, 2009
filing date -
Mar 20, 2009
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Abstract
An apparatus and methods for adaptive and autonomous calibration of pulse transit time measurements to obtain arterial blood pressure using arterial pressure variation. The apparatus and methods give pulse transit time (PTT) devices an ability to self-calibrate. The methods apply a distributed model with lumped parameters, and may be implemented, for example, using pulse transit time measurements derived from a wearable photoplethysmograph (PPG) sensor architecture with an intervening pressurizing mechanism.
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