New Concepts and Advances (Arthroscopic) for the Treatment of Shoulder Pain William F Bennett MD

The Simple Shoulder While a complex joint with complex function, general approaches to determining the non-descript, cause….is easy! I.e., intrinsic versus extrinsic

Intrinsic versus Extrinsic Intrinsic- later and more descript…means pain coming from the shoulder joint itself Extrinsic- pain that may cause shoulder pain but comes from sources outside the shoulder

Extrinsic Most common- cervical spine Pancoast tumors of the lung Thoracic spine Peritoneal/Splenic irritation can cause pain at Erb’s point Angina/MI Metabolic/Oncologic problems, ie., bone marrow involvement like lymphoma/leukemia, parathyroid

Extrinsic-Cervical Spine General rule- -trapezial pain-cervical -deltoid pain- intrinsic or from the shoulder Can have both shoulder and cervical spine affected which makes it more difficult Cervical spine may have radicular involvement

Intrinsic Once extrinsic has been ruled out then one can focus on the intrinsic causes. If a certain shoulder motion whether it be flexion, abduction, external rotation or internal rotation causes pain in the deltoid area and not in the trapezial area, one is probably dealing with an intrinsic problem

Before discussing intrinsic Causes Lets diverge and discuss the anatomy and function of the shoulder

Anatomy 4 joints-two are articulations Glenohumeral joint Acromioclavicular joint Scapulothoracic articulation Sternocalvicular articulation/joint Discuss Bones-Bone models

Ligaments/Capsule Capsule is the “sac” Ligaments- hold bone to bone Normal sac allows motion in various planes Abnormal sac restricts motion in various planes Ligaments- hold bone to bone Glenohumeral ligaments Coracohumeral ligaments Coracoacromial ligaments Coracoclavicular ligaments

Muscles/Tendons Rotator Cuff are a confluence of 4 tendons from the following respective muscle bellies Supraspinatus Subscapularis Infraspinatus Teres minor Biceps Deltoid Bone models

Bursae/Cartilage/Meniscus Subacromial Bursae Subdeltoid bursae Subcoracoid bursae Glenohumeral articular cartilage Acromioclavicular meniscus

Intrinsic Diagnoses Impingement Tendonitis Bursitis Rotator Cuff tear-complete Rotator Cuff tear-partial others

Intrinsic Diagnoses Acromioclavicular joint irritation/arthritis Glenohumeral joint osteoarthritis Rheumatologic joint Pigmented Villonodular synovitis Chondrometaplasia Tumors-giant cell, synovial sarcoma

Intrinsic Diagnoses Instability/Subluxation-repetitive/chronic Atraumatic/multidirectional Dislocation Traumatic unidirectional Biceps Inflammation Instability/subluxation Tendonitis/avulsion

Intrinsic Diagnoses History compatible Physical exam compatible Radiologic exam compatible MRI/MRA compatible Less so- blood work, others Each is a piece of the puzzle

Treatment “ITIS”- inflammation- tendonitis, bursitis Rest, avoidance, NSAIDS, injections, therapy Osteoarthritis- above plus possible total shoulder replacement Rotator Cuff Tears-above +/- repair Instability/Dislocation-+/- repair The arthroscope has become an important tool for diagnosis and treatment in virtually all afflictions of the shoulder

Arthroscope Fiber optic device Triangulate-the surgeon never sees the actual inside of the joint- it is projected upon a monitor and as such, the working tools, “triangulate’ to the point of focus Minimally invasive Less pain Less rehabilitation

Shoulder Pain-traditionally was treated with long delays in surgical intervention-Why? Shoulder pathology not well understood by all orthopedists Open repair required extensive incisions Rehabilitation was long Most importantly, the primary care givers was in general, “under-the-impression” that shoulder surgical intervention was not that effective

Arthroscopic Intervention utilized in Impingement-bursitis, tendonitis Rotator cuff tears Instability or dislocation AC joint arthritis And yes even in Osteoarthritis

Arthroscope has allowed for the further identification of subtle shoulder pathology, previously not identified See articles- 1) Bennett WF. Subscapularis, Medial and Lateral Head Coracohumeral Ligament Insertion Anatomy: Arthroscopic Appearance and Incidence of "Hidden" Rotator Interval Lesions. Arthroscopy. 2001 Feb. 17(2) 173-180 2) Bennett WF. Visualization of the Anatomy of the Rotator Interval. Arthroscopy. 2001 17 107-111

Arthroscopic Prospective outcomes are now Published See Articles- Bennett WF: Arthroscopic Repair of Bennett WF: Arthroscopic Repair of Complete Anterosuperior Rotator Cuff Tears. 2 Year Follow-up. Arthroscopy, January 2003 Bennett WF: Arthroscopic Repair of Complete Subscapularis Tears. 2 Year Follow-up. Arthroscopy, February 2003 Bennett WF: Arthroscopic Repair of Complete Supraspinatus Tears. 2 Year Follow-up. Arthroscopy, March 2003  Bennett WF: Arthroscopic Repair of Massive Rotator Cuff Tears. 2-Year Follow-up Arthroscopy, April 2003

Natural History of Rotator Cuff Tears Recurrence of pain Tears get bigger with time Results of surgical intervention deteriorates with time Muscle turns to fat Tendon becomes inelastic

At this Point Discuss articles and how the arthroscope can repair various intrinsic problems in the shoulder Watch a video of an arthroscopic rotator cuff repair Answer question