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Bioelectric Analyses of an Osseointegrated Intelligent Implant Design System for Amputees

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Published on: July 15, 2009

Gaitography on lower-limb amputees: Repeatability and between-methods agreement.

Celine Timmermans¹, Andrea G Cutti², Hester van Donkersgoed¹

¹1 Department of Human Movement Sciences, Faculty of Behavioural and Movement Sciences, Vrije Universiteit Amsterdam, Amsterdam Movement Sciences, The Netherlands.

Prosthetics and Orthotics International

|August 14, 2018

Summary

This summary is machine-generated.

Gaitography and insoles show good agreement for prosthetic gait analysis. However, limited repeatability restricts long-term monitoring of prosthetic gait changes.

Keywords:

Gait amputees center of pressure online event detection treadmill test

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Area of Science:

Biomechanics
Prosthetics
Gait Analysis

Background:

Gaitography offers rapid, unobtrusive gait parametrization from center-of-pressure trajectories.
Its reliability for prosthetic gait analysis requires further investigation.
Gaitograms can be collected over multiple gait cycles without constraining foot placement.

Purpose of the Study:

To evaluate test-retest repeatability of gaitography and agreement with pressure-insole systems.
To assess the reliability of temporal gait events and characteristics in individuals with prostheses.

Main Methods:

A cohort study involving ten male prosthetic walkers with unilateral amputations.
Measurements were taken using a pressure-insole system on an instrumented treadmill.
Repeated measurements were conducted on separate days to assess repeatability and agreement.

Main Results:

Better between-methods agreement was found for temporal gait characteristics compared to within-method repeatability.
Step times, stride times, and foot-contact events showed good agreement between gaitography and insoles.
Foot-off events and related temporal characteristics exhibited slight systematic biases, detected earlier with insoles.

Conclusions:

Gaitography and insoles demonstrate good agreement for determining temporal gait characteristics in prosthetic users.
Small systematic biases were noted for foot-off events.
Poorer test-retest repeatability for both methods hinders longitudinal assessment of prosthetic gait changes.