A Novel Device to Evaluate the Stiffness of Ankle-Foot Orthosis Devices

2003 ◽  
Vol 125 (6) ◽  
pp. 913-917 ◽  
Author(s):  
P. Cappa, ◽  
F. Patane`, ◽  
M. M. Pierro
Keyword(s):  
Mechanical Behavior ◽  
Gait Analysis ◽  
Clinical Management ◽  
Testing Apparatus ◽  
Ankle Foot Orthosis ◽  
Novel Device ◽  
Reaction Forces ◽  
Global Accuracy ◽  
Foot Orthosis ◽  
Induced Reaction

The evaluation of mechanical behavior of plastic Ankle-Foot Orthosis (AFO) is important since AFO can provide an efficient support to patients with disabilities in locomotion. This paper reports on a novel testing apparatus that allows: (a) the evaluation of AFO stiffness in sagittal and frontal planes; (b) the conduction of semi-automatic trials; and, finally, (c) a global accuracy associated to the AFO stiffness values always less than 4%. The stiffness values are determined by the measurements of the imposed relative displacements between the foot and the shank of the orthosis and the induced reaction forces. The data collected together in an exact 2-D approach, together with those provided by gait analysis systems, allows to better understand gait alteration induced by ankle orthosis, and to improve clinical management of patients.

Classifications of Intentions for Controlling of a Multifunctional Knee-Ankle-Foot Orthosis

2011 ◽  
Author(s):  
Sai-Kit Wu ◽  
Tad Driver ◽  
Xiangrong Shen
Keyword(s):  
Walking Speed ◽  
Accuracy Rate ◽  
Bayes Method ◽  
Ankle Foot Orthosis ◽  
Significant Step ◽  
Reaction Forces ◽  
Velocity Information ◽  
Foot Orthosis ◽  
Motion Intention

This paper describes motion intention classifiers which utilize reaction forces signals from heel and toe; and hip velocity information to predict subject’s intention. Those classifiers using Bayes method to predict (i) walk-to-stop, (ii) walking-speed-changing, and (iii) stop-to-motions. They are very accurate (most of them have accuracy rate higher than 90%) and a significant step in order to develop a multifunctional knee-ankle-foot orthosis.

A wearable gait analysis protocol to support the choice of the appropriate ankle-foot orthosis: A comparative assessment in children with Cerebral Palsy

2019 ◽  
Vol 70 ◽  
pp. 177-185 ◽  
Author(s):  
Bruno Giuseppe Contini ◽  
Elena Bergamini ◽  
Martina Alvini ◽  
Eugenio Di Stanislao ◽  
Giuseppe Di Rosa ◽  
...  
Keyword(s):  
Cerebral Palsy ◽  
Gait Analysis ◽  
Comparative Assessment ◽  
Ankle Foot Orthosis ◽  
Children With Cerebral Palsy ◽  
Foot Orthosis ◽  
Analysis Protocol

scholarly journals A new model of plastic ankle foot orthosis (FAFO (II)) against spastic foot and genu recurvatum

1992 ◽  
Vol 16 (2) ◽  
pp. 104-108 ◽  
Author(s):  
S. Ohsawa ◽  
S. Ikeda ◽  
S. Tanaka ◽  
T. Takahashi ◽  
T. Takeuchi ◽  
...  
Keyword(s):  
Clinical Trials ◽  
Gait Analysis ◽  
Mechanical Stress ◽  
Stance Phase ◽  
Stress Tests ◽  
Ankle Foot Orthosis ◽  
Hamstring Muscles ◽  
Genu Recurvatum ◽  
Foot Orthosis

A plastic ankle foot orthosis (AFO) was developed, referred to as functional ankle foot orthosis Type 2 (FAFO (II)), which can deal with genu recurvatum and the severe spastic foot in walking. Clinical trials were successful or all varus and drop feet, and for most cases of genu recurvatum. Electromyogram studies showed that the FAFO (II) reduced the spasticity of gastrocnemius and hamstring muscles and activated the quadricep muscles. Gait analysis revealed a reduction of the knee angles in the stance phase on the affected side when using the FAFO (II). Mechanical stress tests showed excellent durability of the orthosis and demonstrated its effectiveness for controlling spasticity in comparison with other types of plastic AFOs.

Gait analysis with an Ankle Foot Orthosis with Variable Viscosity Joint

2004 ◽  
Vol 2004.6 (0) ◽  
pp. 109-110
Author(s):  
Yasushi AKAZAWA ◽  
Akio NAKAGAWA ◽  
Tsuyoshi NOMURA ◽  
Masahiro TODOH ◽  
Masao TANAKA
Keyword(s):  
Gait Analysis ◽  
Variable Viscosity ◽  
Ankle Foot Orthosis ◽  
Foot Orthosis
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