Arthroscopy of the acromioclavicular joint.

For many years the Mumford procedure or open resection of the distal clavicle has been the procedure of choice for the treatment of recalcitrant acromioclavicular joint pain. With advancement in shoulder arthroscopy and bursoscopy, arthroscopic resection of the distal clavicle can reproduce similar excellent results, avoiding some of the risks of the open procedure, including joint instability and muscle weakness. The arthroscopist can select from two approaches, a direct or superior approach or the indirect or subacromial approach.

Risk factors for arthroscopic popliteal artery laceration.

A case report is presented in which a patient with well-documented pigmented villonodular synovitis sustained a disruption of the popliteal artery without evidence of penetration of the posterior capsule. The patient had had several extensive open synovectomies in the prior 20 years. These included popliteal space exposure and dissection.