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Indicators of dynamic stability in transtibial prosthesis users.

C Kendell1, E D Lemaire, N L Dudek

  • 1The Ottawa Hospital Rehabilitation Centre, Ottawa, Canada. kendellcynthia@gmail.com

Gait & Posture
|February 9, 2010
PubMed
Summary

Dynamic stability in lower-limb prosthesis users can be assessed using plantar pressure data. Six key parameters reveal differences in stability between prosthetic and intact limbs across various walking conditions.

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Area of Science:

  • Biomechanics
  • Prosthetics and Orthotics
  • Gait Analysis

Background:

  • High fall rates in lower-limb prosthesis users necessitate better dynamic stability assessment.
  • Current stability assessment methods are insufficient for varied walking conditions.
  • Plantar pressure data offers potential for improved dynamic stability evaluation.

Purpose of the Study:

  • To investigate dynamic stability in unilateral transtibial amputation individuals.
  • To analyze stability using six specific parameters derived from plantar pressure data.
  • To compare stability between prosthetic and intact limbs across different terrains.

Main Methods:

  • Twenty community ambulators with unilateral transtibial amputation participated.
  • Plantar pressure data collected using F-Scan Mobile during walking on level ground, uneven ground, stairs, and a ramp.
  • Six dynamic stability parameters (plantar center-of-pressure perturbations and gait temporal parameters) computed for each limb and condition.

Main Results:

  • Significant differences in stability parameters were observed between the prosthetic and intact limbs.
  • Parameter values varied significantly across different walking conditions (level, uneven, stairs, ramp).
  • Prosthesis users exhibited distinct dynamic stability characteristics compared to able-bodied individuals.

Conclusions:

  • The six plantar pressure-derived parameters effectively differentiate dynamic stability in unilateral transtibial prosthesis users.
  • Dynamic stability is influenced by limb (prosthetic vs. intact) and walking environment.
  • Further research should refine parameter calculations and explore links between dynamic stability measures and fall risk.