JOURNAL ARTICLE
RESEARCH SUPPORT, NON-U.S. GOV'T
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Lightweight, modular knee-ankle-foot orthosis for Duchenne muscular dystrophy: design, development, and evaluation.

OBJECTIVE: The study aimed to design and construct a modular system of knee-ankle-foot orthotics (KAFOs) that could be quickly and easily assembled and provided to children with Duchenne muscular dystrophy. A pilot study would then compare the modular orthotics with the childrens' existing devices.

DESIGN: Measurements from the legs of a consecutive sample of 26 Duchenne boys were taken to determine the sizing of the modular system. Nine boys with Duchenne muscular dystrophy were randomly selected to take part in a pilot study that focused on a comparison between their original and modular KAFOs of supply time, weight, energy expenditure during gait, gait speed, and ease of don/doff.

SETTING: The supply and fitting of the KAFOs can be done either in the hospital, clinic, or school.

PATIENTS: Boys with Duchenne muscular dystrophy, referred by the clinician for provision of KAFOs. Nine boys were approached to take part in the pilot study; all accepted. Their age range was 5 to 13 years.

MAIN OUTCOME MEASURES: It is possible, by use of a modular KAFO system, to provide long leg orthoses to boys with Duchenne muscular dystrophy in approximately 1 hour.

RESULTS: The pilot study also showed that the modular KAFOs provided a 23% weight saving, resulting in a 10% energy saving during ambulation and an 8% increase in walking speed. They were easier to don/doff and were preferred by all involved.

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