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Related Experiment Videos

Effect on gait using various prosthetic ankle-foot devices.

R W Wirta1, R Mason, K Calvo

  • 1Department of Veterans Affairs Medical Center, San Diego, CA 92161.

Journal of Rehabilitation Research and Development
|January 1, 1991
PubMed
Summary

Amputees preferred ankle-foot prostheses that reduced shock and increased damping. These findings link subjective preferences for prosthetic devices to objective gait performance metrics.

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Area of Science:

  • Biomechanics
  • Prosthetics
  • Orthopedics

Background:

  • Ankle-foot devices are crucial components of below-knee prostheses.
  • Understanding user preference and device performance is essential for optimizing gait in amputees.

Purpose of the Study:

  • To evaluate the effects of five common ankle-foot prostheses on amputee gait.
  • To correlate subjective amputee preferences with objective biomechanical performance data.

Main Methods:

  • Five ankle-foot devices (SACH, SAFE, SEATTLE, SINGLE AXIS, MULTIPLE AXIS) were tested.
  • Amputee subjective ratings were collected and analyzed.
  • Anterior-posterior angular accelerations post-heel strike were measured and analyzed.

Main Results:

Related Experiment Videos

  • Subjective ratings were related to amputee age, weight, residual limb length, and stride characteristics.
  • Prosthetic performance was characterized by damped oscillatory waveforms of angular acceleration.
  • Amputees preferred devices demonstrating less shock and greater damping.

Conclusions:

  • Amputee preference for ankle-foot prostheses is linked to reduced impact shock and enhanced damping.
  • Objective biomechanical analysis of angular accelerations can inform the design and selection of preferred prosthetic devices.