Department of Computer Science and Information Engineering, Chaoyang University of Technology, Taichung City 41349, Taiwan.
Biomedical Information Engineering Laboratory, The University of Aizu, Aizu-Wakamatsu City 965-8580, Fukushima, Japan.
Nutrients. 2022 Jun 20;14(12):2552. doi: 10.3390/nu14122552.
Currently, in terms of reducing the infection risk of the COVID-19 virus spreading all over the world, the development of touchless blood pressure (BP) measurement has potential benefits. The pulse transit time (PTT) has a high relation with BP, which can be measured by electrocardiogram (ECG) and photoplethysmogram (PPG). The ballistocardiogram (BCG) reflects the mechanical vibration (or displacement) caused by the heart contraction/relaxation (or heart beating), which can be measured from multiple degrees of the body. The goal of this study is to develop a cuffless and touchless BP-measurement method based on a commercial weight scale combined with a PPG sensor when measuring body weight. The proposed method was that the PTT was extracted from the BCG signal measured by a weight scale, and the PPG signal was measured from the PPG probe placed at the toe. Four PTT models were used to estimate BP. The reference method was the PTT extracted from the ECG signal and PPG signal measured from the PPG probe placed at the finger. The standard BP was measured by an electronic blood pressure monitor. Twenty subjects were recruited in this study. By the proposed method, the root-mean-square error () of estimated systolic blood pressure (SBP) and diastolic blood pressure (DBP) are 6.7 ± 1.60 mmHg and 4.8 ± 1.47 mmHg, respectively. The correlation coefficients, , of the proposed model for the SBP and DBP are 0.606 ± 0.142 and 0.284 ± 0.166, respectively. The results show that the proposed method can serve for cuffless and touchless BP measurement.
目前，为了降低 COVID-19 病毒在全球传播的感染风险，开发无触式血压（BP）测量技术具有潜在的益处。脉搏传输时间（PTT）与血压有很高的相关性，可通过心电图（ECG）和光电容积脉搏波（PPG）进行测量。心冲击图（BCG）反映了心脏收缩/舒张（或心跳）引起的机械振动（或位移），可从身体的多个角度进行测量。本研究的目的是开发一种基于商用体重秤和 PPG 传感器的无袖带和无触式血压测量方法，当测量体重时。该方法从体重秤测量的 BCG 信号中提取 PTT，并从放置在脚趾的 PPG 探头测量 PPG 信号。使用四个 PTT 模型来估计血压。参考方法是从放置在手指的 PPG 探头测量的 ECG 信号和 PPG 信号中提取的 PTT。标准血压由电子血压计测量。本研究共招募了 20 名受试者。通过该方法，估计收缩压（SBP）和舒张压（DBP）的均方根误差（）分别为 6.7±1.60mmHg 和 4.8±1.47mmHg。该模型对 SBP 和 DBP 的相关系数，，分别为 0.606±0.142 和 0.284±0.166。结果表明，该方法可用于无袖带和无触式血压测量。
