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Effect of a Hybrid Ankle Foot Orthosis Made of Polypropylene and Fabric in Chronic Hemiparetic Stroke Patients

Do, Kyung Hee MD; Song, Jun-chan PhD; Kim, Jang Hwan PhD; Jung, Gil Su PT; Seo, Sang Wan MS; Kim, Yeung Ki MD; Son, Su Min MD; Jang, Sung Ho MD

American Journal of Physical Medicine & Rehabilitation: February 2014 - Volume 93 - Issue 2 - p 130–137
doi: 10.1097/PHM.0b013e3182a92f85
Original Research Articles

Objective The ankle foot orthosis (AFO) has been used for control of ankle motion in stroke patients for a long time. However, studies on the materials used in construction of AFOs have been limited. In this study, the authors attempted to investigate the effect of a hybrid AFO made with polypropylene and fabric in comparison with a conventional plastic AFO in terms of convenience and effect in patients with chronic hemiparetic stroke.

Design Seventeen patients with chronic hemiparetic stroke who have used plastic AFOs were recruited for this study. Two types of AFOs were used: plastic AFO made with polypropylene and hybrid AFO made with polypropylene covered with canvas fabric, which were individually molded and fitted. Convenience was evaluated using a self-developed questionnaire on patients’ satisfaction and weights of AFO, and effect was evaluated using gait analysis.

Results On the satisfaction questionnaire, satisfaction was greater for the hybrid AFO, and it was lighter in weight than the plastic AFO (P < 0.05). In gait analysis, faster walking speed, larger mean and peak ankle dorsiflexion angles, and ankle dorsiflexion angles at heel strike and toe off were observed for the hybrid and plastic AFOs compared with barefoot (P < 0.05). No significant difference was observed between the two orthoses, except for ankle dorsiflexion angle at heel strike, in which the plastic AFO showed higher ankle dorsiflexion angle than did the hybrid AFO.

Conclusions According to the results of this study, the hybrid AFO showed a similar effect in function, except for ankle dorsiflexion angle at heel strike, and was superior with regard to convenience compared with the conventional plastic AFO in chronic hemiparetic stroke patients. Therefore, it seems that, in general, the hybrid AFO can be recommended for hemiparetic stroke patients who require an AFO.

From the Department of Physical Medicine and Rehabilitation, College of Medicine (KHD, SMS, SHJ), and Medical Devices Clinical Trial Center (GSJ, SWS), Yeungnam University, Taegu, Republic of Korea; Department of Physical Therapy, Daegu Health College, Daegu, Republic of Korea (J-cS); Department of Prosthetics and Orthotics, Hanseo University, Seosan, Republic of Korea (JHK); Department of Rehabilitation Science, Graduate School, Daegu University, Daegu, Republic of Korea (GSJ); and Leaders Rehabilitation Center, Taegu, Republic of Korea (YKK).

All correspondence and requests for reprints should be addressed to: Sung Ho Jang, MD, Department of Physical Medicine and Rehabilitation, College of Medicine, Yeungnam University, 317-1, Daemyungdong, Namku, Taegu, 705-717, Republic of Korea.

Supported by the Korean Small & Medium Business Administration (SM124161).

Financial disclosure statements have been obtained, and no conflicts of interest have been reported by the authors or by any individuals in control of the content of this article.

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