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Stability of walking frames

A B Deathe1, R D Pardo, D A Winter

  • 1Department of Physical Medicine and Rehabilitation, University of Western Ontario, London, Canada.

Journal of Rehabilitation Research and Development
|February 1, 1996
PubMed
Summary
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This study found that adjusting walking frame height by 3 cm did not negatively impact stability in lower-limb amputee patients. This finding offers insights into optimizing walker use for improved patient mobility and support.

Area of Science:

  • Biomechanics
  • Rehabilitation Engineering
  • Prosthetics and Orthotics

Background:

  • Lower-limb amputation often necessitates assistive devices like walking frames for ambulation.
  • Assessing the stability and optimal configuration of walking frames is crucial for patient safety and mobility.
  • Existing methods for evaluating walker stability may not fully capture the nuances of use in amputee populations.

Purpose of the Study:

  • To develop and utilize a novel metric, the Walker Tipping Index (WTI), to assess walking frame stability.
  • To investigate the relationship between walking frame height and patient stability during ambulation in lower-limb amputees.
  • To evaluate the impact of adjusted walking frame heights on load distribution and stability.

Main Methods:

  • Biomechanical analysis was employed to assess stability in 11 patients with single lower-limb amputations using walking frames.

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  • The newly developed Walker Tipping Index (WTI) was used, derived from forces applied to the walking frame.
  • Subjects completed 30-second walking trials at normal, high, and low walking frame height conditions while wearing prostheses.

    • Main Results:

    • The Walker Tipping Index (WTI) was successfully developed and applied to measure walker stability.
    • Adjusting walking frame height by 3 cm above or below the normal setting did not adversely affect patient stability.
    • Preliminary evidence suggests that altered walker heights may redistribute the load between upper and lower extremities.

    Conclusions:

    • The Walker Tipping Index (WTI) shows potential as a clinical criterion for evaluating walker stability across diverse patient groups.
    • Optimizing walking frame height within a small range (±3 cm) appears feasible without compromising stability in lower-limb amputees.
    • Further research is warranted to validate the WTI and explore its application in broader clinical contexts for gait rehabilitation.