Fig 1.

The anterior portal roughly coincides with the intersection of a sagittal line drawn distally from the anterior superior iliac spine and a transverse line across the superior margin of the greater trochanter. Generally, it is directed approximately 45° cephalad and 30° toward the midline. Depending on the patient's anatomy, one may choose to place this slightly more lateral and distal to properly intersect the joint. The anterolateral and posterolateral portals are positioned at the anterior and posterior borders of the trochanteric tip, converging slightly as they enter the joint. © J. W. Thomas Byrd.