Usability evaluation of a VibroTactile Feedback system in stroke subjects
Usability evaluation of a VibroTactile Feedback system in stroke subjects
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DOI：
10.3389/fbioe.2016.00098
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发表时间：
2017-01-24
影响因子：
5.7
通讯作者：
Veltink, Peter H.
中科院分区：
文献类型：
--
作者：
Held, Jeremia P.;Klaassen, Bart;Veltink, Peter H.
背景：为了提高脑卒中患者在日常生活活动中的功能能力，患者接受康复训练以恢复足够的运动控制。为了通过在日常生活中使用手臂来激励自我训练，一种传感器系统（手臂使用教练，AUC）被开发出来，如果患者没有移动受影响的手臂超过一定的阈值水平，它就会提供振动触觉（VT）反馈。本研究的目的是调查该系统在中风受试者中的可用性。方法：本研究设计为反馈方式的可用性和用户接受度研究。纳入了轻度至中度手臂损伤的中风受试者。受试者在每个手腕上佩戴两个AUC设备。VT反馈由受影响手臂上的装置提供。在与AUC进行测量之前和之后进行了半结构化访谈。此外，给出了系统可用性量表（SUS）问卷。结果：10例缺血性慢性脑卒中患者（脑卒中后39 +/- 38个月）入选。10个受试者中有4个在他们受影响的主要手臂上佩戴了VT反馈装置。在测量前的访谈中，8名参与者表示他们更喜欢声音或视觉反馈。在评估后的访谈中，10名参与者中有9名更喜欢视觉反馈而不是视觉和听觉反馈。在测量过程中，AUC平均给出了6次VT反馈。所有的参与者，除了一个人，使用他们的优势臂比非优势臂更多。对于SUS， 8名参与者的回答在80%以上，1名在70 - 80%之间，1名在50%以下。讨论：测试期结束后，更多的患者接受并重视VT反馈，VT是一种可行的反馈方式。AUC可以作为远程康复装置来训练和维持上肢在日常生活任务中的使用。
Background: To increase the functional capabilities of stroke subjects during activities of daily living, patients receive rehabilitative training to recover adequate motor control. With the goal to motivate self-training by use of the arm in daily life tasks, a sensor system (Arm Usage Coach, AUC) was developed that provides VibroTactile (VT) feedback if the patient does not move the affected arm above a certain threshold level. The objective of this study is to investigate the usability of this system in stroke subjects.Method: The study was designed as a usability and user acceptance study of feedback modalities. Stroke subjects with mild to moderate arm impairments were enrolled. The subjects wore two AUC devices one on each wrist. VT feedback was given by the device on the affected arm. A semi-structured interview was performed before and after a measurement session with the AUC. In addition, the System Usability Scale (SUS) questionnaire was given.Results: Ten ischemic chronic stroke patients (39 +/- 38 months after stroke) were recruited. Four out of 10 subjects have worn the VT feedback on their dominant, affected arm. In the pre-measurement interview, eight participants indicated a preference for acoustic or visual over VT feedback. In the post evaluation interview, nine of 10 participants preferred VT over visual and acoustic feedback. On average, the AUC gave VT feedback six times during the measurement session. All participants, with the exception of one, used their dominant arm more then the non-dominant. For the SUS, eight participants responded above 80%, one between 70 and 80%, and one participant responded below 50%.Discussion: More patients accepted and valued VT feedback after the test period, hence VT is a feasible feedback modality. The AUC can be used as a telerehabilitation device to train and maintain upper extremity use in daily life tasks.