If no traction table is used (i.e., using the freehand technique) the cable
method may be used. In this technique, the electrocautery cord is held from the
iliac spine across the patella to the cleft between the first and second toes.
If rotation is correct, this cord will pass over the midline of the patella,
and slightly medial to the tibial eminence. The radiological landmarks of the
center of the femoral head, the center of the knee and the center of the ankle
joint should all be in line if the mechanical axis of the femur is correct.