Preparation for correct positioning
Determine the correct position for the DCS with the help of guide wires
around the joint. Under image intensifier control, pass one guide wire lateral
to medial along the tibio-femoral joint line (red). Pass a second guide wire
over the anterior surface of the knee to indicate the plane of the
patello-femoral condyles (green).
The ideal position of the DCS is shown by the yellow wire. Note that it is
inserted parallel to both the red wire in the frontal plane and is parallel to
the green line on the end-on view on the femur. This latter orientation ensures
that the plate comes to lie flush with the lateral cortex.