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KMID : 1012020210100030311
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Physical Therapy Rehabilitation Science
2021 Volume.10 No. 3 p.311 ~ p.319
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The Influence of Auditory-Feedback Device Using Wearable Air-Pressure Insole on Spatiotemporal Gait Symmetry in Chronic Hemplegia
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Heo Ji-Hun
Song Chang-Ho
Jung Sang-Woo
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Abstract
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Objective: To investigate the effect of emphasized initial contact by using a wearable air-pressure insole to provide auditoryfeedback with variations of maximum peak pressure (MPP) of the affected side on spatiotemporal gait parameters and gait symmetry of stroke patients
Design: A cross-sectional study
Methods: Eighteen stroke patients participated in this study. All subjects walked five trials using an air-pressure insole that provides auditory feedback with different thresholds set on the insole. First, subjects walked without any auditory feedback. Then, the MPP threshold on the affected side was set from 70% and increase threshold by 10% after each trial until 100%. They walked three times or more on the gait analyzer for each trial, and the average values were measured. Before starting the experiment, subjects measured body weight, initial gait abilities and affected side MPP without auditory feedback.
Results: Temporal and spatial variables were significantly increased in trials with auditory feedback from air-pressure insole except for non-paralyzed single support time and spatial gait symmetry compared to trials without auditory feedback(p<0.05). Among the four different thresholds, the walking speed, unaffected side single support time, affected and unaffected side stride, and affected side step length were greatest at 80% threshold of maximum peak, while affected single support time, temporal gait symmetry, and unaffected step length were greatest at the maximum peak of 100% threshold.
Conclusions: These results indicate that auditory feedback gait using air-pressure insoles can be an effective way to improve walking speed, single support time, step length, stride, and temporal gait symmetry in stroke patients.
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KEYWORD
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Pressure insole, Stroke, Gait, Auditory feedback
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