Patent ID: 8518051

Claim:
A system for determining the mechanical axis of a leg of a subject, said mechanical axis running from the femoral head to the center of the ankle joint of said leg, and said system comprising: a leg rotation fixture, comprising: a peripheral support frame, said peripheral support frame comprising an adjustable clamping device attached thereto, such that when the subject's leg is inserted through said peripheral support frame, actuation of said clamping device clamps the leg therewithin; a bearing which enables said leg rotation fixture to rotate about an axis perpendicular to the plane of its peripheral support frame; and a pointer attached to said peripheral support frame in such a position that it is aimed at said axis about which said leg rotation fixture rotates, wherein said adjustable clamping device is spatially adjustable to a position in said peripheral support frame such that said pointer can be aimed at the center of the ankle of the subject, such that rotation of said leg rotation fixture about said axis rotates said leg about its mechanical axis.