Shoulder arthroscopy is a minimally invasive surgical technique that can be used both for the diagnosis and treatment of various conditions. It involves the insertion of specialized instruments through small skin incisions, allowing—thanks to the continuous development of new surgical techniques and the assistance of advanced technologies and materials—the performance of some of the most complex procedures in the shoulder joint.
Although surgery is usually performed under general anesthesia with the occasional addition of regional nerve blocks for postoperative pain control, in patients who have strong indications for surgery but may not be suitable candidates for general anesthesia, regional nerve blocks (such as supraclavicular or interscalene) can be safely used as the sole method of anesthesia during the procedure. During surgery, the patient is positioned either in the semi-reclined “beach chair” position or lying on their side in the lateral decubitus position. Each position has its advantages and disadvantages. The former is more flexible if conversion to an open procedure is required and allows for reduced blood loss from the surgical field, while the latter may provide improved visualization of the joint due to the applied traction on the limb. Ultimately, the choice is determined by the surgeon’s preference and familiarity with each positioning technique.
Arthroscopic surgery is generally performed through small incisions (0.5–1 cm) that allow specially designed instruments to enter the joint spaces. This setup enables visualization (camera and cold light), inflow and outflow of irrigation fluid through a closed system, tissue grasping, cutting, cauterization, drilling, suturing, and more. In most shoulder arthroscopies, two or three arthroscopic portals are used: a posterior, an anterior, and a lateral, and/or an accessory secondary portal. The skin is closed with one or two sutures per portal, followed by the application of large, soft dressings and either a sling or a shoulder immobilizer, depending on the specific postoperative restrictions of the procedure performed.
Shoulder arthroscopy can serve as a powerful diagnostic tool, enabling the surgeon to directly evaluate the entire shoulder joint, as well as the subacromial space (where the rotator cuff tendons are located) and the acromioclavicular joint, thus clarifying diagnostic dilemmas that cannot be resolved through imaging methods alone.
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In addition, arthroscopy can be used for the removal of intra-articular loose bodies, repair of labral injuries, and biceps tendon lesions (such as those seen in shoulder instability or Superior Labrum Anterior to Posterior—SLAP lesions, respectively). It can also be applied for debridement and repair of rotator cuff tears, as well as for subacromial decompression. Acromioclavicular joint pathology can also be addressed arthroscopically, whether due to traumatic instability (reconstruction of the coracoclavicular ligament) or degenerative disease (e.g., distal clavicle resection). Arthroscopic release of capsular adhesions in frozen shoulder/adhesive capsulitis can also be performed if manipulation under anesthesia fails to restore mobility. In shoulder arthritis, arthroscopy may offer a minimally invasive initial option for the removal of osteophytes, loose bodies, and hypertrophic synovium, improving joint mobility and buying time before a more invasive procedure, such as shoulder arthroplasty, becomes necessary. Finally, arthroscopic tenotomy or tenodesis of the long head of the biceps tendon can be performed, as well as the less frequent release of the suprascapular nerve.
Although shoulder arthroscopy is generally a safe procedure, like any surgery it carries some risk of complications. Infection rates are low (less than 1%), as are intra-articular fractures or injuries to tendons and cartilage. Failure of arthroscopic repairs of labral or rotator cuff tears is a recognized complication, which surgeons strive to avoid by carefully selecting patients who will most benefit from an arthroscopic rather than an open approach. Despite their small size, the creation of arthroscopic portals and the insertion of instruments may theoretically endanger nearby nerves and vessels. However, such injuries are rare, and when they occur, symptoms are usually temporary (neuropraxia). Specifically, creation of the posterior portal may injure the axillary nerve (causing shoulder numbness, impaired abduction) or the suprascapular nerve (causing weakness in abduction and external rotation). The anterior portal may affect the cephalic vein (resulting in postoperative hematoma) or the musculocutaneous nerve (causing sensory loss in the lateral forearm and weakness in elbow flexion and supination). Interscalene blocks used for anesthesia or postoperative analgesia may theoretically cause phrenic nerve injury, leading to elevation of the ipsilateral hemidiaphragm and respiratory difficulty. Nevertheless, these neurovascular complications can be minimized by using anatomical landmarks for portal placement and, for nerve blocks, adjuncts such as nerve stimulators or ultrasound guidance by the anesthesiologist.
Rehabilitation protocols after shoulder arthroscopy vary depending on the specific procedure performed. As a general rule, all patients are placed in some form of shoulder immobilization postoperatively, and sutures are removed about two weeks after surgery. Patients undergoing rotator cuff debridement, capsular release, osteophyte or loose body removal, or synovectomy may begin active and active-assisted range-of-motion exercises almost immediately after surgery. Conversely, after rotator cuff repair, labral repair, tendon transfers, or bone-block procedures for glenoid reconstruction, the shoulder must remain immobilized in a brace for 4–6 weeks before active or active-assisted movement is allowed. During this period, gentle scapular mobilization is encouraged to minimize postoperative stiffness and pain. Passive mobilization and strengthening exercises are introduced progressively after the initial immobilization phase (6–8 weeks). Full recovery of strength and function, particularly for high-demand athletes and manual laborers, may take up to 6 months.
In conclusion, shoulder arthroscopy is a versatile, minimally invasive surgical technique that can be used to manage a wide range of shoulder pathologies. With specialized tools, complex procedures can be performed through small incisions, minimizing surgical trauma and postoperative pain. While not completely free of complications, these are generally rare and mild in nature. Postoperative rehabilitation, despite the relatively atraumatic surgical approach, may be lengthy, sometimes extending up to 6 months, due to the healing requirements of repaired or reconstructed soft tissues and the complexity of the shoulder joint as an anatomical structure.
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