Comparison of real-life accidental falls in older people with experimental falls in middle-aged test subjects
Comparison of real-life accidental falls in older people with experimental falls in middle-aged test subjects
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DOI：
10.1016/j.gaitpost.2011.11.016
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发表时间：
2012-03-01
期刊：
影响因子：
2.4
通讯作者：
Jamsa, T.
中科院分区：
文献类型：
--
作者：
Kangas, M.;Vikman, I.;Jamsa, T.
跌倒是老年人常见的事故。自动跌倒探测器是提高安全性的一种方法。然而，在大多数情况下，跌倒检测器的设计和测试数据来自年轻人的实验性福尔斯。这项研究是第一个提供从现实生活中的福尔斯获得的与跌倒有关的加速度数据的研究。无线传感器被用来收集老年人在六个月的测试期间的加速度数据。从五个事件代表向前福尔斯，侧身跌倒，向后跌倒，从床上摔下来的数据进行了收集，并与中年测试对象进行实验福尔斯进行比较。来自真实生活中的福尔斯的信号与来自故意福尔斯的信号具有相似的特征。现实生活中的向前、侧向和向后福尔斯跌倒都显示出一个撞击前阶段和一个撞击阶段，这与基于实验福尔斯跌倒的模型一致。此外，从床上摔下来的加速度曲线与同类型的实验福尔斯相似。然而，用于检测跌倒阶段的参数存在差异。在所有从站立姿势开始的真实福尔斯跌倒中，都检测到跌倒的开始，而没有检测到高的撞击前速度。在一些现实生活中的福尔斯，多重影响建议采取保护措施。总之，这项研究证明了老年人的真实福尔斯跌倒与中年受试者的实验福尔斯跌倒之间的相似性。然而，从实验福尔斯检测到的一些跌倒特征在来自相应的异质真实生活福尔斯的加速度信号中是不可检测的。(C)2011 Elsevier B.V.保留所有权利。
Falling is a common accident among older people. Automatic fall detectors are one method of improving security. However, in most cases, fall detectors are designed and tested with data from experimental falls in younger people. This study is one of the first to provide fall-related acceleration data obtained from real-life falls. Wireless sensors were used to collect acceleration data during a six-month test period in older people. Data from five events representing forward falls, a sideways fall, a backwards fall, and a fall out of bed were collected and compared with experimental falls performed by middle-aged test subjects. The signals from real-life falls had similar features to those from intentional falls. Real-life forward, sideways and backward falls all showed a pre impact phase and an impact phase that were in keeping with the model that was based on experimental falls. In addition, the fall out of bed had a similar acceleration profile as the experimental falls of the same type. However, there were differences in the parameters that were used for the detection of the fall phases. The beginning of the fall was detected in all of the real-life falls starting from a standing posture, whereas the high pre impact velocity was not. In some real-life falls, multiple impacts suggested protective actions. In conclusion, this study demonstrated similarities between real-life falls of older people and experimental falls of middle-aged subjects. However, some fall characteristics detected from experimental falls were not detectable in acceleration signals from corresponding heterogeneous real-life falls. (C) 2011 Elsevier B.V. All rights reserved.