The anterolateral portal lies most centrally in the safe zone for arthroscopy and thus is the portal established first for introduction of the arthroscope. It is positioned directly over the superior margin of the greater trochanter at its anterior border (see Figure 7.2). Accounting for the slightly anterior position of the femoral head resulting from femoral neck anteversion, this allows a relatively straight shot into the hip joint under fluoroscopic guidance in the anteroposterior (AP) plane. Care should be taken during portal placement to assure neutral rotation of the hip because excessive internal or external rotation alters the relationship of the greater trochanter with the femoral head.
The anterolateral portal penetrates the gluteus medius before entering the lateral aspect of the cap-
Was this article helpful?
This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.