Efficiency of Voluntary Closing Hand and Hook Prostheses

@article{Smit2010EfficiencyOV,
  title={Efficiency of Voluntary Closing Hand and Hook Prostheses},
  author={Gerwin Smit and Dick H. Plettenburg},
  journal={Prosthetics and Orthotics International},
  year={2010},
  volume={34},
  pages={411 - 427}
}
The Delft Institute of Prosthetics and Orthotics has started a research program to develop an improved voluntary closing, body-powered hand prosthesis. [] Key Method Five commercially available voluntary closing terminal devices were mechanically tested: three hands [Hosmer APRL VC hand, Hosmer Soft VC Male hand, Otto Bock 8K24] and two hooks [Hosmer APRL VC hook, TRS Grip 2S]. The test results serve as a design guideline for future prostheses.

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Body powered voluntary closing (VC) hand prostheses allow users to proportionally control grasping devices in a very intuitive sense using the concept of extended physiological proprioception (EPP).

High Cable Forces Deteriorate Pinch Force Control in Voluntary-Closing Body-Powered Prostheses

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High cable forces lead to reduced pinch force control during object manipulation, which implies that low cable operation forces should be a key design requirement for voluntary-closing BPPs.

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The capacities and limitations of prosthetic users will aid in choosing and redesigning future BPPs to prevent non-use, and it remains unclear if these force levels are sufficient to comfortably operate a BPP, or too low leading to non- use.

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A new type of capstan-based passive brake mechanism in a voluntary-closing prosthetic terminal device that does not require a physical user input to engage or disengage the lock, adding a benefit over the existing mechanisms.

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...

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