Analyzes of daily activity of elderly using a portable device for monitoring cardiovascular parameters together with human postures

本研究设计了一个可结合人体姿势动态监测心血管参数的原型系统，并将其应用于老年人日常生活活动的评估。该系统主要由两部分组成，一部分是分别基于容积法和经胸电导纳法的血压（BP）和心输出量（CO）的无创测量。另一种是使用电磁倾斜仪的动态人体姿态监测。通过使用健康受试者进行的系统性能测试，证实该设备能够监测受试者日常生活中的昼夜血液动力学变化以及详细的姿势变化。应用该系统，研究了老年人日常活动对心血管参数昼夜变化的影响和对日常活动的定量评价两个主要课题，探讨了老年人日常活动对心血管参数昼夜波动的影响。 ...更多信息 使用8名健康受试者（5名男性和3名女性）进行48小时动态监测实验。在实验的第一天，受试者进行正常的日常活动，而在第二天，他们在床上休息，并享有浴室特权。从所获得的结果，它表明，昼夜节律波动不仅观察到BP，但也。为了分析老年人日常生活中的姿势变化，对8名71 ~ 83岁的女性受试者进行了10 h的日常生活姿势监测实验。从通过直方图和动画数据分析获得的数据中，清楚地表明，生活条件，例如在医院、在卫生保健服务设施中、在有或没有家人的家中，强烈地影响受试者的姿势变化和活动，例如，住院患者的焦虑水平显著低于非住院患者，有家人在家的焦虑水平显著低于无家人在家的焦虑水平。这些结果表明，要防止所谓的“卧床不起的老人”，生活条件应仔细考虑。少

In this project, a prototype system for ambulatory monitoring of cardiovascular parameters together with human postures was devised and applied for assessing activity of elderly in daily life. The system consisted mainly of two parts ; one is for noninvasively measuring blood pressure (BP) and cardiac output (CO) based on volume oscillometric and transthoracic electrical admittance method, respectively. The other is for ambulatory human posture monitor using electromagnetic inclinometers. Through the system performance tests using healthy subjects, it was confirmed that the device was capable of monitoring diurnal haemodynamic change in daily life together with detailed posture change in the subject. Using this system, two main subjects were investigated ; one is effect of daily activity on diurnal change in cardiovascular parameters and the other is quantitative assessment of daily activity in elderly.To evaluate effect of daily activity on circadian fluctuation of the parameters, exp … More eriments for 48-hour *mbulatory monitoring were carried out using 8 healthy subjects (5 males and 3 females). On the first day of the experiment, the subjects were under normal daily activity, while on the second day, they were under bed rest with bathroom privileges. From the results obtained, it was demonstrated that circadian fluctuations were observed not only in BP, but also in. CO and other parameters such as peripheral resistance, and these fluctuations were also observed even in the second day, suggesting not only physical activity but also mental and psychological stress could be a cause of the circadian fluctuations.To analyze daily posture change of elderly, experiments of 10-hours' monitoring of posture under Daily life were performed using 8 female subjects aged from 71 to 83. From the data obtained by histogram and animation data analysis, it was clearly demonstrated that the living condition such as, in hospital, in facility of health care services, in home with or without family, strongly affect the subject's posture change and activity, e.g., those of the subjects in hospital were significantly lower than the others, and those of the subjects in home with family were lower than those without family. These results suggest that to prevent so called "bedridden elderly", living condition should be carefully considered. Less