Kyberd Peter J
University of New Brunswick, Canada.
Prosthet Orthot Int. 2012 Mar;36(1):33-8. doi: 10.1177/0309364611426905. Epub 2011 Nov 7.
The addition of a passive wrist to a single degree of freedom prosthesis has an effect on its functionality. The amount of impact is undetermined.
To measure the grasping function of a commercial single degree of freedom hands with and without two forms of passive wrist flexor.
Form-board and timed tasks.
Repeated measures with a single subject using a validated assessment tool. The test measured the function of one conventional, single axis, powered hand controlled by the same myocontroller format. It was used in conjunction with a passive three position wrist flexor, a wrist with compliance in the flex/extend and radial/ulnar deviation and compared with a hand without these axes.
The overall functional score of the hand alone was 80 out of 100. The use of a wrist flexion unit resulted in a higher score (83) and the compliant wrist achieved a score of 79. The addition of a wrist allowed improved performance in Power, Lateral and Tips grips for both wrist designs, in addition the Extension grip was improved with the compliant wrist.
Wrist flexion had a positive impact on the functional score. It enabled some tasks to be performed quicker and with less difficulty.
在单自由度假手上增加一个被动手腕会对其功能产生影响。影响程度尚未确定。
测量带有两种被动腕屈肌形式和不带有被动腕屈肌形式的商用单自由度假手的抓握功能。
模板和定时任务。
使用经过验证的评估工具对单个受试者进行重复测量。测试测量了一个由相同肌电控制模式控制的传统单轴动力假手的功能。它与一个被动三位置腕屈肌、一个在屈伸和桡尺偏斜方面具有顺应性的手腕配合使用，并与没有这些轴的假手进行比较。
仅假手的整体功能评分为80分（满分100分）。使用腕屈单元得分更高（83分），顺应性手腕得分为79分。对于两种手腕设计，增加手腕后在强力抓握、侧方抓握和指尖抓握方面的表现都有所改善，此外，顺应性手腕在伸展抓握方面也有所改善。
腕屈对功能评分有积极影响。它使一些任务能够更快、更轻松地完成。
