Lur

freely to the medial capsule as illustrated. (C) The cannula/obtura-tor assembly is being placed over the guidewire. (D) The position of the 30-degree arthroscope is shown while a spinal needle is being placed for an ancillary portal.

degree scope provides a direct view of the ligamentum teres, which resides in the inferior portion of the fossa. The transverse acetabular ligament can also be partially viewed coursing underneath the ligamentum teres. After the inspection with the 70-degree scope is completed, the 30-degree scope is then used, reversing the sequence of steps between the three portals. The 30-degree scope provides a better view of the central portion of the femoral head and acetabulum and the superior portion of the acetabular fossa.

Once the traction has been released and the hip flexed, the arthroscope is repositioned from the an-terolateral portal on the anterior neck of the femur, providing an excellent perspective of the peripheral compartment (Figures 10.25, 10.26). This position brings into view structures that cannot be seen from inside the joint and also provides a different peripheral perspective on some of the intraarticular structures. The medial synovial fold is consistently visualized adjacent to the anteromedial neck of the femur.

Normal Variants

The lateral and the anterior portions of the labrum are the most variable. Sometimes this portion of the labrum is thin, poorly developed, and hypoplastic, and at other times it may appear enlarged. In the presence of acetabular dysplasia, the lateral labrum is especially

Anterior Labrum Anterior Wall Femoral Head

Femoral Head

Greater A Trochanter

Anterolateral Portat (Camera)

Femoral Head

Greater A Trochanter

Anterolateral Portat (Camera)

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Essentials of Human Physiology

Essentials of Human Physiology

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.

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