Development of a Hip Joint as a Component of a Hip Guidance Orthosis for Paraplegic Patients

Kumar, Sulok and Joseph, Benjamin and Somaraju, VVJ and Nagaraja, . (1998) Development of a Hip Joint as a Component of a Hip Guidance Orthosis for Paraplegic Patients. In: Proceedings of National Conference on Biomedical Engg, April 9-11, 1998., MIT Manipal.

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A paraplegic patient can only waut with the help of a Hip-Knee-Ankle-Foot orthosis (HKAFO) which extends from the trunk to the feet. As there are no functional muscles to stabilise the hips and the knees, they are kept locked in extension in the traditional HKAFO. The patient has to then move forward either by swiveling the entire body or by swinging the trunk forward with the help of crutches. Both these modes of propulsion entail extremely high energy consumption levels. In this study an attempt has been made to design an orthotic hip joint without compromising stability. The design incorporates an eccentric uniaxial joint that uses gravity as power for initial hip flexion. A spring assistance is also given to facilitate forward flexion against gravity. The range of flexion can be altered to simulate normal ambulation by appropriate modifications in the metal housing. The design also prevents the hip from buckling into flexion during the stance phase, when the hip is loaded. The table top model has been shown to function satisfactorily. Clinical evaluation of the joint is progressing.

Item Type: Conference or Workshop Item (Paper)
Subjects: Engineering > MIT Manipal > Mechanical and Manufacturing
Depositing User: MIT Library
Date Deposited: 09 Jul 2016 15:43
Last Modified: 09 Jul 2016 15:43

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