| 摘要 |
<p>A noninvasive arterial pressure monitor (2) provides calibrated, continuous pressure waveform and beat-by-beat pressure values with no occlusion of an artery during an extended monitoring period. Noninvasive doppler sensors (14, 16) are secured over a major artery. Signals from the sensors (14, 16) are used to mathematically characterize the artery. The time-varying arterial resonant frequency is correlated to blood pressure throughout the cardiac cycle. Doppler sensors (14, 16) provide bi-directional flow velocity waveforms from which arterial resonant frequency may be calculated. A calibration cuff (34) is used infrequently to calibrate the system to units of pressure.</p> |
