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Jaipur foot
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Jaipur foot
The Jaipur foot, also known as the Jaipur leg, is a rubber-based prosthetic leg for people with below-knee amputations. Although inferior in many ways to the composite carbon fibre variants, its variable applicability and cost efficiency make it an acceptable choice for prosthesis. Ram Chandra Sharma and orthopedic surgeon P. K. Sethi designed and developed it in 1968.
The Jaipur foot consists of a rubber core, wooden block and vulcanised rubber coating. It is a soft multi axial artificial foot and provides enough dorsiflexion to permit an amputee to squat. Use of the Jaipur foot is limited to prosthetic users at the level of household and limited community ambulation, since it is unsuitable for high level activities and sports or if the user must transverse uneven terrain.
The idea of the Jaipur foot was conceived by Ram Chander Sharma, a craftsman, and P. K. Sethi, who was then the head of the Department of Orthopedics at Sawai Man Singh Medical College in Jaipur. Existing prosthetic feet did not allow users to go barefoot, squat or sit crosslegged, or work in muddy fields, all of which were common in poorer areas of India. Sharma and Sethi set out to design a cheap foot that could work for this cultural context.
The Jaipur foot was named after Jaipur, India, where it was designed.
The Jaipur foot is composed of a wooden ankle and a rubber heel and forefoot section, all surrounded by a thin outer layer of tire cord, a rubber composite.
It is a modification of the Solid Ankle Cushioned Heel (SACH) foot, with the wooden ankle of the SACH foot replaced with a more flexible block of rubber, which allows the user to squat or sit cross-legged. In the original design, the expensive wooden shank of the SACH foot, used to attach the foot to the user's leg, is replaced with a cheaper aluminum shank. A later version is made of high-density polyethylene, which increases the durability and the convenience of use.
The original version was made primarily of rubber, while a later version is made of polyurethane, which is lighter. However, the Jaipur foot is still heavier than standard prosthetics.
The Jaipur foot has some advantages relative to conventional SACH feet, especially in the range of movements it offers. It is possible to move the ankle and foot thanks to the shorter keel and rubber ankle. The materials used at the foot-end are waterproof and somewhat mimic a real foot. These features help amputees using the foot assimilate more easily in a semi-urban or rural setup in the Indian subcontinent and other developing countries.
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Jaipur foot
The Jaipur foot, also known as the Jaipur leg, is a rubber-based prosthetic leg for people with below-knee amputations. Although inferior in many ways to the composite carbon fibre variants, its variable applicability and cost efficiency make it an acceptable choice for prosthesis. Ram Chandra Sharma and orthopedic surgeon P. K. Sethi designed and developed it in 1968.
The Jaipur foot consists of a rubber core, wooden block and vulcanised rubber coating. It is a soft multi axial artificial foot and provides enough dorsiflexion to permit an amputee to squat. Use of the Jaipur foot is limited to prosthetic users at the level of household and limited community ambulation, since it is unsuitable for high level activities and sports or if the user must transverse uneven terrain.
The idea of the Jaipur foot was conceived by Ram Chander Sharma, a craftsman, and P. K. Sethi, who was then the head of the Department of Orthopedics at Sawai Man Singh Medical College in Jaipur. Existing prosthetic feet did not allow users to go barefoot, squat or sit crosslegged, or work in muddy fields, all of which were common in poorer areas of India. Sharma and Sethi set out to design a cheap foot that could work for this cultural context.
The Jaipur foot was named after Jaipur, India, where it was designed.
The Jaipur foot is composed of a wooden ankle and a rubber heel and forefoot section, all surrounded by a thin outer layer of tire cord, a rubber composite.
It is a modification of the Solid Ankle Cushioned Heel (SACH) foot, with the wooden ankle of the SACH foot replaced with a more flexible block of rubber, which allows the user to squat or sit cross-legged. In the original design, the expensive wooden shank of the SACH foot, used to attach the foot to the user's leg, is replaced with a cheaper aluminum shank. A later version is made of high-density polyethylene, which increases the durability and the convenience of use.
The original version was made primarily of rubber, while a later version is made of polyurethane, which is lighter. However, the Jaipur foot is still heavier than standard prosthetics.
The Jaipur foot has some advantages relative to conventional SACH feet, especially in the range of movements it offers. It is possible to move the ankle and foot thanks to the shorter keel and rubber ankle. The materials used at the foot-end are waterproof and somewhat mimic a real foot. These features help amputees using the foot assimilate more easily in a semi-urban or rural setup in the Indian subcontinent and other developing countries.
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