Contactless Technique for Measuring Blood-Pressure Variability from One Region in Video Plethysmography
Contactless Technique for Measuring Blood-Pressure Variability from One Region in Video Plethysmography
复制标题
视频体积描记法中测量某一区域血压变异性的非接触式技术
DOI：
10.1007/s40846-018-0388-8
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发表时间：
2018
影响因子：
2
通讯作者：
Tomoyuki Yambe
中科院分区：
文献类型：
--
作者：
Norihiro Sugita;Makoto Yoshizawa;Makoto Abe;Akira Tanaka;Noriyasu Homma;Tomoyuki Yambe
血压的突然变化经常是由日常事件引起的，比如锻炼、紧张的工作和在不同温度环境之间移动。有时，血压的突然变化可能会危及人类的生命。为了减少这种风险，之前有几项研究提出了监测血压变化的非接触式方法；然而，关于这一问题的研究数量还不够。在以前的方法中，基于对视频记录的图像的分析，使用从两个不同皮肤区域获得的脉搏波的传播时间来估计血压的变化，这被称为视频体积图。然而，在测量过程中必须保持两个皮肤区域的相对位置关系，这使得方法受到限制。为了解决这一问题，在本研究中，我们提出了一种新的方法，该方法只使用从一个皮肤区域获得的视频体积图。特别是，计算了视频体积图中的失真程度，作为估计血压的新指标。根据我们对20名健康受试者的实验结果，我们确定了从手掌区域获得的拟议指数与血压变异性以及以前的方法是相关的。
Sudden changes in blood pressure are frequently caused by daily events such as exercise, stressful work, and moving between different temperature environments. Sometimes, an abrupt change in blood pressure can endanger human lives. To mitigate such a risk, several studies have previously proposed contactless methods for monitoring changes in blood pressure; however, the number of studies on this issue is insufficient. In previous methods, changes in blood pressure were estimated using the propagation time of the pulse waves obtained from two different skin areas on the basis of an analysis of images from video recordings, which is called a video plethysmogram. However, the relative positional relationship of the two skin areas had to be maintained during the measurement, making the approach restrictive. To solve this problem, in the present study, we propose a new method using the video plethysmogram obtained from only one skin area. In particular, the degree of distortion in the video plethysmogram is calculated as a new index to estimate the blood pressure. On the basis of the results of our experiments with 20 healthy human subjects, we ascertain that the proposed index obtained from the palm area is correlated with the blood-pressure variability as well as the previous approach.