Lonini Luca, Reissman Timothy, Ochoa Jose M, Mummidisetty Chaithanya K, Kording Konrad, Jayaraman Arun
From the Max Nader Lab for Rehabilitation Technologies and Outcomes Research, Rehabilitation Institute of Chicago, Chicago, Illinois (LL, CKM, AJ); Department of Physical Medicine and Rehabilitation, Northwestern University, Chicago, Illinois (LL, KK, AJ); Center for Bionic Medicine (LL, TR, JMO, CKM, AJ), and Sensory Motor Performance Program (KK), Rehabilitation Institute of Chicago, Chicago, Illinois; and Department of Mechanical Engineering, University of Dayton, Dayton, Ohio (TR).
Am J Phys Med Rehabil. 2017 Oct;96(10 Suppl 1):S128-S134. doi: 10.1097/PHM.0000000000000750.
The objective of rehabilitation after spinal cord injury is to enable successful function in everyday life and independence at home. Clinical tests can assess whether patients are able to execute functional movements but are limited in assessing such information at home. A prototype system is developed that detects stand-to-reach activities, a movement with important functional implications, at multiple locations within a mock kitchen.
Ten individuals with incomplete spinal cord injuries performed a sequence of standing and reaching tasks. The system monitored their movements by combining two sources of information: a triaxial accelerometer, placed on the subject's thigh, detected sitting or standing, and a network of radio frequency tags, wirelessly connected to a wrist-worn device, detected reaching at three locations. A threshold-based algorithm detected execution of the combined tasks and accuracy was measured by the number of correctly identified events.
The system was shown to have an average accuracy of 98% for inferring when individuals performed stand-to-reach activities at each tag location within the same room.
The combination of accelerometry and tags yielded accurate assessments of functional stand-to-reach activities within a home environment. Optimization of this technology could simplify patient compliance and allow clinicians to assess functional home activities.
脊髓损伤后康复的目标是使患者能够在日常生活中成功发挥功能并在家中实现自理。临床测试可以评估患者是否能够执行功能性动作，但在评估患者在家中的此类信息方面存在局限性。开发了一种原型系统，该系统可在模拟厨房的多个位置检测从站立到够物的活动，这是一种具有重要功能意义的动作。
10名不完全性脊髓损伤患者进行了一系列站立和够物任务。该系统通过结合两种信息源来监测他们的动作：放置在受试者大腿上的三轴加速度计检测坐立或站立状态，以及无线连接到腕戴设备的射频标签网络检测在三个位置的够物动作。一种基于阈值的算法检测组合任务的执行情况，并通过正确识别事件的数量来衡量准确性。
该系统在推断个体在同一房间内每个标签位置进行从站立到够物活动的时间时，平均准确率为98%。
加速度测量法和标签的结合对家庭环境中的功能性从站立到够物活动进行了准确评估。该技术的优化可以简化患者的依从性，并使临床医生能够评估家庭功能性活动。
