Skip to the content

Gait evaluation of new powered knee-ankle-foot orthosis in able-bodied persons: A pilot study

Arazpour, M, Ahmadi, F, Bani, MA, Hutchins, SW, Bahramizadeh, M, Ghomshe, FT and Kashani, RV 2014, 'Gait evaluation of new powered knee-ankle-foot orthosis in able-bodied persons: A pilot study' , Prosthetics and Orthotics International, 38 (1) , pp. 39-45.

[img] PDF
Restricted to Repository staff only

Download (4MB) | Request a copy


Background: Knee-ankle-foot orthoses are utilized for walking by patients with lower limb weakness. However, they may be rejected by patients due to the lack of knee flexion available when using them for walking activities. Aim: The aim of this study was to perform a pilot study investigating the effect of a new powered knee-ankle-foot orthosis on walking in healthy persons before testing with patients with lower limb weakness. Methods: Walking evaluation was performed on five healthy subjects (mean age: 26 ± 5.6 years). Walking trials were randomly performed in three test conditions: normal walking without an orthosis, walking with a conventional knee- ankle-foot orthosis unilaterally, and also with a new powered knee-ankle-foot orthosis applied to the same leg. Results: The means of walking speed, cadence, and knee flexion during swing and step length were all decreased. Compensatory motions were increased by both orthoses compared to normal walking. More knee flexion was observed in both swing and stance phases when walking with the powered knee-ankle-foot orthosis compared to the conventional knee-ankle-foot orthosis. Conclusion: The results demonstrated the potential of a powered orthosis in providing improvements in gait parameters compared to a conventional device in healthy subjects but are yet untested in subjects with lower limb weakness.

Item Type: Article
Uncontrolled Keywords: Kinematics, Powered knee-ankle-foot orthosis, Temporal-spatial parameters, Walking, adult, ankle foot orthosis, article, controlled study, gait, greater trochanter human, knee ankle foot orthosis, knee function limb weakness, mobilization, normal human, pilot study walking speed, young adult
Themes: Health and Wellbeing
Schools: Schools > School of Health Sciences > Centre for Health Sciences Research
Schools > School of Health Sciences
Journal or Publication Title: Prosthetics and Orthotics International
Publisher: SAGE Publications
Refereed: Yes
ISSN: 0309-3646
Related URLs:
Funders: Non funded research
Depositing User: S Rafiq
Date Deposited: 16 Apr 2014 09:03
Last Modified: 30 Nov 2015 23:42
References: References: Waters, R.L., Campbell, J., Thomas, L., Energy costs of walking in lower-extremity plaster casts (1982) J Bone Joint Surg Am, 64 (6), pp. 896-899; Bowker, P., Brader, D., Pratt, D., (1993) Biomechanical Basis of Orthotic Management, , Butterworth-Heinemann Ltd, Oxford, UK; McMillan, A.G., Kendrick, K., Michael, J.W., Preliminary evidence for effectiveness of a stance control orthosis (2004) J Prosthet Orthot, 16 (1), pp. 6-13; Kaufman, K.R., Irby, S., Mathewson, J., Energy-efficient knee-ankle-foot orthosis: A case study (1996) J Prosthet Orthot, 8 (3), pp. 79-85; Yakimovich, T., Lemaire, E., Kofman, J., Engineering design review of stance-control knee-ankle-foot orthoses (2009) J Rehabil Res Dev, 46 (2), pp. 257-268; Hebert, J.S., Liggins, A.B., Gait evaluation of an automatic stance-control knee orthosis in a patient with postpoliomyelitis (2005) Arch Phys Med Rehabil, 86 (8), pp. 1676-1680; Tokuhara, Y., Kameyama, O., Kubota, T., Biomechanical study of gait using an intelligent brace (2000) J Orthop Sci, 5 (4), pp. 342-348; Irby, S.E., Bernhardt, K.A., Kaufman, K.R., Gait of stance control orthosis users: The dynamic knee brace system (2005) Prosthet Orthot Int, 29 (3), pp. 269-282; Irby, S.E., Kaufman, K.R., Mathewson, J.W., Automatic control design for a dynamic knee-brace system (1999) IEEE Trans Rehabil Eng, 7 (2), pp. 135-139; Arazpour, M., Chitsazan, A., Hutchins, S.W., Evaluation of a novel powered gait orthosis for walking by a spinal cord injury patient (2012) Prosthet Orthot Int, 36 (2), pp. 239-246; Moreno, J.C., Brunetti, F., Rocon, E., Immediate effects of a controllable knee ankle foot orthosis for functional compensation of gait in patients with proximal leg weakness (2008) Med Biol Eng Comput, 46 (1), pp. 43-53; Ferris, D.P., Sawicki, G.S., Domingo, A.R., Powered lower limb orthoses for gait rehabilitation (2005) Top Spinal Cord Inj Rehabil, 11 (2), pp. 34-49; Blaya, J.A., Herr, H., Adaptive control of a variable-impedance ankle-foot orthosis to assist drop-foot gait (2004) IEEE Trans Neural Syst Rehabil Eng, 12 (1), pp. 24-31; Allard, P., Duhaime, M., Thiry, P., Use of gait simulation in the evaluation of a spring-loaded knee joint orthosis for Duchenne muscular dystrophy patients (1981) Med Biol Eng Comput, 19 (2), pp. 165-170; Arazpour, M., Chitsazan, A., Hutchins, S.W., Design and simulation of a new powered gait orthosis for paraplegic patients (2012) Prosthet Orthot Int, 36 (1), pp. 125-130; Ohta, Y., Yano, H., Suzuki, R., A two-degree-of-freedom motor-powered gait orthosis for spinal cord injury patients (2007) Proc IMech E, Part H: J Engineering in Medicine, 221 (6), pp. 629-639; Yakimovich, T., Lemaire, E.D., Kofman, J., Preliminary kinematic evaluation of a new stance-control knee-ankle-foot orthosis (2006) Clin Biomech, 21 (10), pp. 1081-1089

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)


Downloads per month over past year