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Related Experiment Videos

Design methodology for a multifunctional hand prosthesis

R Vinet1, Y Lozac'h, N Beaudry

  • 1Mechanical Engineering Department, Ecole Polytechnique de Montréal, Ouébec, Canada.

Journal of Rehabilitation Research and Development
|November 1, 1995
PubMed
Summary
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This study reviews prehension methods and designs a novel hand prosthesis. Computer-aided design (CAD) simplified the development of finger mechanisms, enabling efficient prosthesis functionality.

Area of Science:

  • Biomedical Engineering
  • Robotics
  • Biomechanics

Background:

  • Prehension, the act of grasping, is crucial for hand function.
  • Existing hand prostheses often have limitations in replicating natural prehension.
  • Defining finger and thumb motion is key to improving prosthetic hand design.

Purpose of the Study:

  • To review existing approaches for defining finger and thumb motion for prehension.
  • To present the design of a novel hand prosthesis incorporating a new thumb plane of action.
  • To outline design specifications and functional characteristics for an advanced prosthetic hand.

Main Methods:

  • Review of prehension motion definitions.
  • Morphology design of the hand prosthesis using 3-D computer-aided design (CAD).

Related Experiment Videos

  • 4-bar mechanism design for individual finger actuation.
  • Interference checks for tridigital and lateral prehension patterns using CAD.

    • Main Results:

    • Identical finger joint flexion angles were achieved for both tridigital and lateral prehension.
    • The primary difference between prehension patterns was the thumb's plane of flexion inclination.
    • CAD proved instrumental in optimizing hand morphology and verifying functional mechanics.

    Conclusions:

    • The simplified finger mechanism design significantly enhances prosthetic hand development.
    • The proposed hand prosthesis design offers improved functional characteristics.
    • Computer-aided design (CAD) is an indispensable tool for future prosthetic hand innovation.