Should I Have Surgery For My Shoulder Impingement? Arthroscopic shoulder decompression surgery (ASAD) is a surgery performed for patients with subacromial shoulder pain, or “shoulder impingement”, which accounts for up to 70% of all shoulder pain problems. The first ASAD was performed in 1972, and it is now one of the most common surgical procedures in orthopaedics. The rationale behind the procedure is that the pain is caused by excessive compression of the rotator cuff (shoulder muscles) and its bursa…