The DEKA Arm has multiple degrees of freedom which historically have been operated primarily by inertial measurement units (IMUs). However, the IMUs are not appropriate for all potential users; new control methods are needed. The purposes of this study were: 1) to describe usability and satisfaction of two controls methods—IMU and myoelectric pattern recognition (EMG-PR) controls—and 2) to compare ratings by control and amputation level. A total of 36 subjects with transradial (TR) or transhumeral (TH) amputation participated in the study. The subjects included 11 EMG-PR users (82% TR) and 25 IMU users (68% TR). The study consisted of in-laboratory training (Part A) and home use (Part B). The subjects were administered the Trinity Amputation and Prosthesis Experience satisfaction scale and other usability and satisfaction measures. Wilcoxon rank-sum tests compared the differences by control type. The differences were compared for those who did and did not want a DEKA Arm. The preferences for features of the DEKA Arm were compared by control type. The comparisons revealed poorer ratings of skill, comfort, and weight among EMG-PR users. The TR amputees using IMUs rated usability more favorably. TH amputees rated usability similarly. The TR amputees using EMG-PR were less satisfied with weight, pinch grip, and wrist display, whereas the TH amputees were less satisfied with the full system, wires/cables, and battery. Usability and satisfaction declined after Part B for EMG-PR users. Overall, we found that the IMU users rated the DEKA Arm and the controls more favorably than the EMG-PR users. The findings indicate that the EMG-PR system we tested was less well accepted than the IMUs for control of the DEKA Arm.

中文翻译：

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DEKA 臂的 EMG 模式识别控制：对用户满意度和可用性评分的影响

DEKA Arm 具有多个自由度，历史上主要由惯性测量单元 (IMU) 操作。然而，IMU 并不适合所有潜在用户；需要新的控制方法。本研究的目的是：1) 描述两种控制方法——IMU 和肌电模式识别 (EMG-PR) 控制的可用性和满意度，以及 2) 比较控制和截肢水平的评级。共有 36 名经桡动脉 (TR) 或经肱骨 (TH) 截肢的受试者参与了这项研究。受试者包括 11 名 EMG-PR 用户（82% TR）和 25 名 IMU 用户（68% TR）。该研究包括实验室内培训（A 部分）和家庭使用（B 部分）。受试者接受了三位一体截肢和假肢体验满意度量表以及其他可用性和满意度测量。Wilcoxon 秩和检验按对照类型比较了差异。比较了那些想要和不想要 DEKA 臂的人的差异。对 DEKA 臂特征的偏好按对照类型进行了比较。比较显示 EMG-PR 用户的技能、舒适度和体重评分较低。使用 IMU 的 TR 截肢者对可用性的评价更高。TH 截肢者对可用性的评价类似。使用 EMG-PR 的 TR 截肢者对重量、捏握和手腕显示不太满意，而 TH 截肢者对整个系统、电线/电缆和电池不太满意。EMG-PR 用户在 B 部分之后的可用性和满意度下降。总的来说，我们发现 IMU 用户比 EMG-PR 用户对 DEKA 臂和控件的评价更高。