Sensor-based apparatus and method for portable noninvasive monitoring of blood pressure
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United States of America Patent
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Issued Date -
Sep 7, 2006
app pub date -
Mar 4, 2005
filing date -
Mar 4, 2005
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
Blood pressure including systolic pressure, diastolic pressure, and pulse rate may be determined from a portable monitoring device that noninvasively senses at the surface of a patient's body pressure pulses that are influenced by blood flow in an underlying artery. As varying hold-down pressure is applied to the artery through overlying tissue, the pressure pulses are sensed by a transducer to produce waveform data. The varying pressure is applied automatically in a predetermined pattern using a pneumatic system, and is preferably swept in an increasing fashion so the waveform data from a series of pressure pulses are obtained with different amounts of force being applied. The waveform data from the sensed pressure pulses is analyzed to determine waveform parameters, and blood pressure is calculated in the portable monitoring device based upon the waveform parameters.
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