Browsing by Author "Kamat, Y.D."

Filter results by typing the first few letters
Now showing 1 - 2 of 2
  • No Thumbnail Available
    Item
    A Review on Designs of Various Ankle Foot Orthosis (AFO) Used to Treat Drop Foot Disease
    (Springer Science and Business Media Deutschland GmbH, 2021) Kubasad, P.R.; Todeti, S.R.; Kamat, Y.D.
    Compared to the last few decades, there is an increase in prevalence of neuromuscular diseases like stroke, multiple sclerosis, and cerebral palsy. These diseases cause lower limb disability like drop foot. The main reason for drop foot is weakness in dorsiflexor muscles. Drop foot results in ‘toe drag during swing phase’ and ‘foot slap during heel contact’. Ankle foot orthosis (AFO) is a mechanical device, which is used to treat drop foot. Based on usage of sensors, actuators, and control systems, there are three types of AFOs: Semi active, Active, and Passive AFOs. Semi active and Active AFOs contain sensors, actuators, control systems, and onboard power source. Passive AFOs do not contain electrical boards but contain mechanical elements to control relative motion between foot part and shank part of the AFOs. Based on relative motion between foot and shank parts of AFOs, AFOs are also classified into two types: Non-articulated (or Fixed) and Articulated AFOs. Non-articulated AFOs are single piece devices having no relative motion between foot part and shank part of the device. Articulated AFOs are two-piece devices, having relative motion between foot part and shank part of the device, and the relative motion is controlled by passive and active actuators. In this paper, different working principles, advantages, and disadvantages of the existing AFOs are presented. © 2021, Springer Nature Singapore Pte Ltd.
  • No Thumbnail Available
    Item
    Design and analysis of a passive ankle foot orthosis by using transient structural method
    (IOP Publishing Ltd, 2020) Kubasad, P.R.; Gawande, V.A.; Todeti, S.R.; Kamat, Y.D.; Vamshi, N.
    Foot drop is a condition where individuals are unable to lift the foot through the ankle. It results in slap foot after heel contact and toe drag during the swing phase. Ankle Foot Orthosis (AFO) is a mechanical device that supports both the ankle and foot of the individual and guides the movements of the foot to prevent slap foot and toe drag. There are two types of AFOs:Passive AFO and Active AFO. In this work, design and static analysis of a passive AFO to fit a human foot is presented. The static analysis was carried out for AFO made of two different materials (Polypropylene and High-Density Polyethylene (HDPE)) with two different thicknesses (3mm and 4mm). Based on the results obtained from the static analysis, the design of AFO was optimized for shape and thickness.Further dynamic analysis was carried out on the optimized AFO to know its behaviour in walking condition. The results obtained from the static and dynamic analyses showed that the polypropylene AFO was better compared to that of HDPE AFO by generating less stress, deformation, and factor of safety. The proposed AFO can be fabricated and tested for real-time walking conditions. © Published under licence by IOP Publishing Ltd.