Wetzler Marie-Laure, Borderies Jean René, Bigaignon Odile, Guillo Pascal, Gosse Philippe
Novacor, 4 passage Saint Antoine, 92508 Rueil-Malmaison, France.
Blood Press Monit. 2003 Dec;8(6):229-35. doi: 10.1097/00126097-200312000-00002.
The aim of the study was to evaluate the efficiency of a position/activity monitoring system based on a dual-axis accelerometer strapped to the subject's thigh and a position sensor located within a monitor placed on the subject's belt.
Twenty-six subjects wearing two monitors (one accelerometer on each thigh) were submitted to various activities and positions under the control of an observer. An analysis of each tracing was performed both manually by a technician and automatically by dedicated software before being compared with the information gathered during the study.
The accelerometer allowed accurate discrimination between the standing versus the sitting and lying positions. The sitting and lying positions were correctly detected by the built-in position sensor provided the unit was firmly attached. Walking was adequately detected by the accelerometer. The activity score was well correlated with treadmill speed. Changes in position and activity were detected with a mean error of less than 3 s.
The combination of an accelerometer placed on the subject's thigh and a position sensor located at the subject's waist appeared to be a suitable system for position/activity monitoring during ambulatory ECG and blood pressure monitoring.
本研究旨在评估一种基于绑在受试者大腿上的双轴加速度计和位于受试者腰带上的监测器内的位置传感器的位置/活动监测系统的效率。
26名佩戴两个监测器（每条大腿上一个加速度计）的受试者在观察者的控制下进行各种活动和姿势。在与研究期间收集的信息进行比较之前，由技术人员手动对每次记录进行分析，并由专用软件自动进行分析。
加速度计能够准确区分站立、坐着和躺着的姿势。只要设备牢固固定，内置位置传感器就能正确检测出坐着和躺着的姿势。加速度计能充分检测到行走状态。活动评分与跑步机速度密切相关。位置和活动的变化检测平均误差小于3秒。
置于受试者大腿上的加速度计和位于受试者腰部的位置传感器相结合，似乎是一种适用于动态心电图和血压监测期间位置/活动监测的系统。
