论文标题
无袖口连续血压测量的加速度计
Accelerometric Method for Cuffless Continuous Blood Pressure Measurement
论文作者
论文摘要
脉冲转运时间（PTT）已被广泛用于无袖状血压（BP）测量。但是，它需要一个以上的心血管信号，涉及多个传感设备。在本文中，我们提出了一种借助左心室射血时间（LVET）的连续无袖状血压测量方法。使用通过微电动机电系统（MEMS）基于基于的加速度计量传感器获得的信号估算LVET。传感器在胸表面获得地震心动图（SCG）信号，并提取LVET信息。通过用受试者的原始动脉血压值校准系统，可以估算收缩压（SBP）和舒张压（DBP）。使用不同的定量措施评估了所提出的方法，该方法对从仰卧位下的十个受试者收集的信号进行了评估。还将所提出方法的性能与两种早期方法进行了比较，其中PTT间隔是从心电图（ECG） - 光绘制图（PPG）和SCG-PPG估算的。性能结果清楚地表明，所提出的方法与最新方法相媲美。同样，将计算的血压与通过CNAP系统测量的原始血压进行比较。它给出了估计的收缩BP和舒张压BP的平均误差，分别为-0.19 +/- 3.3 mmHg和-1.29 +/- 2.6 mmHg。收缩压和舒张压BP的平均绝对误差分别为3.2 mmHg和2.6 mmHg。根据提出的方法估计的BPS的准确性满足了5 +/- 8 mmHg偏差的IEEE标准的要求，因此，它可用于无处不在的长期血压监测。
Pulse transit time (PTT) has been widely used for cuffless blood pressure (BP) measurement. But, it requires more than one cardiovascular signals involving more than one sensing device. In this paper, we propose a method for continuous cuffless blood pressure measurement with the help of left ventricular ejection time (LVET). The LVET is estimated using a signal obtained through a micro-electromechanical system (MEMS)-based accelerometric sensor. The sensor acquires a seismocardiogram (SCG) signal at the chest surface, and the LVET information is extracted. Both systolic blood pressure (SBP) and diastolic blood pressure (DBP) are estimated by calibrating the system with the original arterial blood pressure values of the subjects. The proposed method is evaluated using different quantitative measures on the signals collected from ten subjects under the supine position. The performance of the proposed method is also compared with two earlier approaches, where PTT intervals are estimated from electrocardiogram (ECG)-photoplethysmogram (PPG) and SCG-PPG, respectively. The performance results clearly show that the proposed method is comparable with the state-of-the-art methods. Also, the computed blood pressure is compared with the original one, measured through a CNAP system. It gives the mean errors of the estimated systolic BP and diastolic BP within the range of -0.19 +/- 3.3 mmHg and -1.29 +/- 2.6 mmHg, respectively. The mean absolute errors for systolic BP and diastolic BP are 3.2 mmHg and 2.6 mmHg, respectively. The accuracy of BPs estimated from the proposed method satisfies the requirements of the IEEE standard of 5 +/- 8 mmHg deviation, and thus, it may be used for ubiquitous long term blood pressure monitoring.
