science

Jaipur foot

Jaipur foot is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Jaipur foot rather than just read about it. In short: 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.

Key takeaways

Jaipur foot belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Jaipur foot to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Jaipur foot from memory before moving on to harder problems.

Reference excerpt

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.

History 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.

Design

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. The Jaipur foot was never patented or otherwise standardized. As a result, there is significant variation in the quality of feet and their fitting. It has a typical lifespan of around 2–5 years.

Distribution In India, the Jaipur foot can be fitted for free by Bhagwan Mahaveer Viklang Sahayata Samiti (BMVSS), a charitable organization for amputees and other disabled people founded by Devendra Raj Mehta. The government of India supports BMVSS with financial aid to carry out the work done by the organization. It costs approximately $45 to make. BMVSS, in collaboration with a team at Stanford University, also developed the Jaipur knee - a versatile and budget-friendly prosthetic knee joint that mimics the natural joint's movements. Time listed the Jaipur Knee as one of the best inventions of 2009. The Jaipur foot is commonly used in low-income countries and warzones as a low-cost alternative to conventional prosthetics. It was used during the war in Afghanistan to help treat land mine victims.

In popular culture Sudha Chandran, an Indian actress and dancer, lost her limb in an accident in 1982. She was fitted with the Jaipur foot and started dancing once again; her journey is the theme of the Telugu 1984 film Mayuri (Peahen), re-made into a 1986 Hindi film, Naache Mayuri (Peahen Dancing). Both the films starred Sudha as the lead.

Awards P. K. Sethi was awarded the Magsaysay Award for Community Leadership in 1981, and the Padma Shri by the Government of India in 1981. Dr. D R Mehta received the Rajasthan Ratna for his contribution to Jaipur foot in 2013 by Rajasthan Government.

References

External links Official website

Illustrations

Worked examples

Example 1 — a first encounter with Jaipur foot

Start with the simplest possible case. Write down what Jaipur foot claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Jaipur foot before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Jaipur foot ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Jaipur foot

In research: Jaipur foot appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Jaipur foot in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Jaipur foot is common in secondary-school and first-year university syllabi. It links to neighbouring topics Disability in India, Jaipur, Prosthetics, so understanding it makes those chapters shorter.
In everyday life: Look for Jaipur foot outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Jaipur foot in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Jaipur foot means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Jaipur foot out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Jaipur foot in simple terms?

Why does Jaipur foot matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Jaipur foot?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Jaipur foot.