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Body-powered hand prosthesis with low operating power for children.

J Kruit1, J C Cool

  • 1Department of Mechanical Engineering, Delft University of Technology, The Netherlands.

Journal of Medical Engineering & Technology
|January 1, 1989
PubMed
Summary

A new elbow-controlled prosthetic hand was developed for children with below-elbow amputations. This innovative prosthesis requires low operating power, enabling effective hand function for young users.

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Area of Science:

  • Pediatric Rehabilitation
  • Biomedical Engineering
  • Prosthetics and Orthotics

Background:

  • Children with unilateral below-elbow amputations often face challenges with traditional prosthetic devices.
  • Existing prostheses may require significant muscle strength, which is typically insufficient in young children for effective operation.

Purpose of the Study:

  • To develop and evaluate a novel elbow-controlled prosthetic hand for pediatric unilateral below-elbow amputees.
  • To address the limitations of low triceps muscle power in children by designing a low-operating-power mechanism.

Main Methods:

  • Development of a specialized prosthetic hand with a unique low-power activation mechanism.
  • Integration of a mechanism that utilizes elbow extension to control hand grip and opening.

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  • Inclusion of a stiff spring for a strong grip and a weaker spring for opening the hand.

    • Main Results:

    • Successful development of an elbow-controlled hand prosthesis suitable for children.
    • The prosthesis incorporates a mechanism that allows activation with minimal triceps power.
    • Initial trials with six pediatric users demonstrated positive engagement and feedback.

    Conclusions:

    • The developed elbow-controlled prosthetic hand offers a viable solution for children with below-elbow amputations.
    • The low-operating-power mechanism effectively overcomes the strength limitations in young users.
    • User enthusiasm has driven further improvements and redesign of the system.