| 摘要 |
<p>An apparatus (100) and a method use noninvasive electrical bioimpedance measurements to monitor the mean arterial blood pressure of a patient (102) on a continuous (hearbeat-by-hearbeat) basis. The apparatus (100) and method process the electrical impedance across two segments of body tissue (124, 144) to provide a signal for each segment that indicates the increase in blood flow in each segment at the beginning of each cardiac cycle. The apparatus (100) and method process the signals corresponding to each segment to measure the arterial pulse propagation delay between the two segments (124, 144). The arterial pulse propagation delay is inversely related to the mean arterial blood pressure of the patient (102). The apparatus (100) and method use the measured arterial pulse propagation delay to calculate the mean arterial blood pressure of the patient (102).</p> |
