The best site for performing a conventional above knee amputation is, which of the following
|A||9 to 10 cm proximal to the knee|
|B||10 cm distal to the anterior superior lilac spine|
|C||30 cm proximal to the knee|
|D||5 cm distal to the pubic tubercle|
9 to 10 cm proximal to the knee
a. The conventional above knee prosthesis extends for 9 to 10 cm distal to the end of the prosthetic socket and the bone must be amputed this far proximal to the knee to allow room for the joint.
b. When the level of the amputation is more distal the joint of the prosthesis will be more distal than the knee of the opposite limb and this is cosmetically unacceptable