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Polio Caliper & KAFO Leg Braces — Made and Fitted in Gwalior
A polio caliper is a leg brace worn by people whose leg muscles were weakened or paralysed by poliomyelitis. In clinical terms it is usually a KAFO (knee ankle foot orthosis) — a jointed metal or thermoplastic frame running from the thigh to the foot that takes over the stabilising job the paralysed muscles can no longer do, so the leg does not buckle when weight goes through it.
India stopped recording wild poliovirus cases in 2011 and was certified polio-free in 2014, but the people who contracted polio before then are still here — now adults, many in their thirties, forties and older. They are the patients who come to us for calipers: for a first fitting, for a replacement when an old brace has worn out, or because an aluminium caliper made twenty years ago has become too heavy to keep using.
Limbgenixx makes and fits custom calipers at our centre in Gwalior, Madhya Pradesh. A caliper has to be built to the shape and the specific weakness of one leg, so it is measured, made and fitted in person.
Who a Polio Caliper Is For
A caliper is considered when the muscles around the knee or ankle cannot hold the joint steady under body weight. The commonest picture in post-polio patients is a weak or absent quadriceps — the knee gives way at heel strike — often combined with a foot that drops or rolls. Other situations where the same brace is used:
- Post-polio residual paralysis with an unstable knee, a shortened limb or a fixed deformity
- Post-polio syndrome — new weakness and fatigue appearing decades after the original illness, where a brace reduces the load on a tiring leg
- Flail or flaccid limb from spinal cord injury or nerve injury, where the mechanics are similar
- Genu recurvatum (the knee bending backwards over time) that needs to be blocked
- Children with residual weakness who need growth-adjustable bracing — see pediatric orthotics
If the weakness is only below the knee — a dropped foot with a stable knee — a lighter AFO is usually the right device instead of a full caliper. If both legs and the hips are involved, an HKAFO may be needed. Part of the assessment is working out which of the three you actually need, because a heavier brace than necessary tends to end up unused.
Types of Polio Caliper
Conventional Metal & Leather Caliper
Steel or aluminium side bars with a leather or padded thigh band and a shoe attachment. Robust, repairable in most towns, and the type most often supplied under government schemes. Heavier than plastic, but it tolerates rough use and can be adjusted with basic tools.
Thermoplastic (Moulded) KAFO
Moulded to a cast of the leg, so the load is spread over a wider contact area instead of a few straps. Lighter, fits inside normal footwear more easily, and controls rotation better. Needs a limb without severe fixed deformity or heavy fluctuation in size.
Carbon Fibre / Hybrid Caliper
Composite uprights with metal joints. The lightest option and the one most often asked for by adults who walk long distances or who have developed post-polio fatigue. Costs more and repairs are less improvised, so it suits patients who can return for servicing.
Knee Joint Options
A drop-lock (ring-lock) joint holds the knee straight for walking and is released to sit — simple and secure. An offset joint allows a freer knee for patients with some quadriceps power. A stance-control joint locks only while weight is on the leg and frees the knee to swing, giving a more natural gait for suitable patients.
How a Caliper Is Made and Fitted
- Assessment. We check muscle power group by group, joint range, any fixed deformity, leg length difference, and how you currently walk — with and without whatever brace or support you already use.
- Decision on the device. Which level (AFO, KAFO, HKAFO), which joint type, which material, and whether a shoe raise is needed for a leg length difference.
- Measuring or casting. Measurements for a conventional caliper; a plaster cast of the limb for a moulded KAFO.
- Fabrication in our workshop, with the joints aligned to your own knee and ankle centres.
- Trial fitting. You stand and walk in it. We look for pressure points, correct alignment, and whether the knee is genuinely stable. Adjustments are made here — this stage usually matters more than any other.
- Walking practice and hand-over, including how to lock and unlock the joints, how to put the brace on alone, and how long to build up wear time.
- Review. A check after the first few weeks of real use, once the brace has been worn on normal ground rather than in the workshop.
How many visits this takes depends on the limb and the device. We will give you a realistic estimate for your own case when we have seen your assessment or photographs — that conversation can happen on WhatsApp before you travel. See planning a visit from another state.
Living With a Caliper
Skin comes first. Check the skin over the knee, the shin and the top of the thigh band every time the brace comes off. Redness that fades within about twenty minutes is acceptable; redness that stays, or any broken skin, means stop wearing it and come back for an adjustment. This matters more if sensation in the leg is reduced.
Build wear time up gradually over the first week or two rather than wearing a new caliper all day immediately.
Keep it serviced. Joints loosen, rivets work free, straps stretch and leather softens. A caliper that has developed play at the knee joint is no longer holding the knee properly. Getting it tightened is quick; walking on a failing brace and falling is not.
Footwear is part of the brace. A conventional caliper is attached to a specific shoe, and its alignment assumes that shoe's heel height. Changing to a different shoe changes how the whole brace works.
Expect to replace it. Adults typically need a replacement when the frame or joints wear out or body weight changes significantly. Children outgrow braces and need them remade during growth. If you are unsure whether yours is still doing its job, bring it in — see repairs and servicing.
Government Scheme Support
Assistive devices including calipers are covered for eligible people under the Government of India's ADIP scheme, administered through ALIMCO, and under various state disability welfare schemes. Eligibility normally depends on a disability certificate and an income ceiling set by the scheme.
We can tell you what documentation to bring and help you prepare an application. We cannot decide your eligibility — that is the issuing authority's decision, and the criteria change from time to time, so please confirm the current rules with the scheme before counting on them.
Frequently Asked Questions
A polio caliper is a leg brace worn by people whose leg muscles were weakened or paralysed by polio. Clinically it is usually a KAFO (knee ankle foot orthosis): a jointed frame from thigh to foot that stabilises the knee and ankle so the leg does not give way under body weight. It supports the leg; it does not restore the paralysed muscle.
In most cases yes. 'Caliper' is the everyday Indian term and 'KAFO' is the clinical one for the same class of device. A caliper that stops below the knee is really an AFO, and one that extends up to a pelvic band is an HKAFO. Which one you need depends on which muscle groups are weak.
Yes. Most caliper patients in India today are adults who had polio in childhood. Some come for a first brace, some for a replacement, and some because new weakness or fatigue has developed decades later, which is known as post-polio syndrome. The leg is assessed as it is now, not as it was then.
Thermoplastic and carbon fibre designs are considerably lighter than a conventional steel caliper. How light yours can safely be depends on your body weight, how much control the knee needs and whether there is a fixed deformity, because a lighter frame has to be stiff enough to hold the joint. This is decided at assessment.
Eligible people can receive assistive devices including calipers under the central ADIP scheme through ALIMCO, and under some state disability welfare schemes. Eligibility usually depends on a disability certificate and an income limit. We can advise on documentation and help you apply, but the decision rests with the issuing authority and current criteria should be confirmed with the scheme.
Yes, for the fitting. A caliper is measured or cast from your own leg and then aligned to your knee and ankle while you stand and walk in it, so those stages have to happen in person at our centre in Gwalior. We can discuss your case, look at photographs and reports, and plan the visit with you beforehand on WhatsApp.
Talk to Limbgenixx About Polio Caliper
Our centre is in Gwalior, Madhya Pradesh. Patients travel to us from across India — message us first so we can tell you what your case is likely to need before you plan a trip.
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