When installing thigh prosthesis, the length of residual limb is the ideal length left by amputation at 15cm in the middle third. Generally, the location of amputation depends on the degree of limb injury and the blood circulation there. Doctors will try their best to preserve the joint function and the length suitable for installing thigh prosthesis.
Above-knee amputation usually means removing the leg from above the knee. This will only keep a small part of the leg. This category includes amputations at any distance above the knee.