What's new in shoulder and elbow surgery

Recurrent Shoulder Instability in a Young, Active, Military Population and Its Professional Implications

Background:

Shoulder instability is a topic of significant interest within the sports medicine literature, particularly regarding recurrence rates and the ideal treatment indications and techniques. Little has been published specifically addressing the occupational implications of symptomatic recurrent shoulder instability.

Hypothesis:

Previous arthroscopic repair will continue to be a significant predisposing factor for recurrent instability in a young, active population, and that recurrent instability may have a negative effect on college graduation and postgraduate occupational selection.

Study Design:

Case series.

Level of Evidence:

Level 4.

Methods:

We conducted a retrospective review of approved medical waivers for surgical treatment of anterior shoulder dislocation or instability prior to matriculation at the US Military Academy or the US Naval Academy for the graduating classes of 2010 to 2013. Statistical analysis was performed to determine the incidence and risk factors for recurrence and to determine the impact on graduation rate and occupation selection.

Results:

Fifty-nine patients were evaluated; 34% developed recurrent anterior instability. Patients with previous arthroscopic repair had a significantly higher incidence of recurrence (38%, P = 0.044). Recurrent shoulder instability did not significantly affect graduation rates or self-selected occupation (P ≥ 0.05).

Conclusion:

There is a significant rate of recurrent shoulder instability after primary surgical repair, particularly among young, active individuals. In addition, arthroscopic repair resulted in a significantly higher recurrence rate compared with open repair in our population. Surgical repair for shoulder instability should not necessarily preclude young individuals from pursuing (or being considered for) occupations that may place them at greater risk of recurrence.

Clinical Relevance:

The risk of recurrent instability is greater than the rate typically described, which may suggest that some subpopulations are at greater risk than others. A unique data point regarding instability is the effect on occupation selection.

A modified approach for elbow arthroscopy using an adjustable arm holder

BACKGROUND

Position shifting from elbow arthroscopy to open surgery could complicate the surgical procedures; patient safety and risks of contamination are of concern. The aim of this study is to retrospectively assess the safety and efficacy of elbow arthroscopy in 32 elbows of 32 patients using a modified arm holder to facilitate subsequent open surgery in supine position.

METHODS

We performed a retrospective study in arthroscopy of the elbow performed with patients in the supine position under general or regional anesthesia. Arthroscopic indications were intraarticular lesions with or without second disorders. The operated arm was securely supported using an adjustable arm holder, which allowed a second surgical procedure without repositioning the patient. We recorded arthroscopic findings, clinical outcome, and complications for all patients. The average duration of follow-up was 17.1 months. Functional assessment was based on the Mayo Elbow Performance Score.

RESULTS

All patients had either good or excellent results with a mean Mayo Elbow Performance Score of 89.2 ± 7.2. Final motion arc averaged 113.3 ± 11.8; residual motion limitation was noted in 2 patients with preoperative ankylosis. No complications were observed immediately after surgery or during follow-up except transient paresthesia along medial cutaneous nerve in 2 patients. A total of 17 patients (53.1%) underwent other surgeries (19 procedures) after arthroscopy; 16 of these surgeries were open elbow procedures including ligament repair (7), ligament reconstruction (5), and ulnar nerve transposition (4). The average time for arthroscopy was 45.2 min; the time interval between the end of arthroscopy and the start of the second surgery procedure averaged 6.5 min.

CONCLUSIONS

Arthroscopy of the elbow using an adjustable arm holder with the patients in the supine position was safe and efficacious. This procedure eliminates the need for repositioning the patient and thus may facilitate subsequent concomitant surgical procedures.

Robot-assisted surgery of the shoulder girdle and brachial plexus

New developments in the surgery of the brachial plexus include the use of less invasive surgical approaches and more precise techniques. The theoretical advantages of the use of robotics versus endoscopy are the disappearance of physiological tremor, three-dimensional vision, high definition, magnification, and superior ergonomics. On a fresh cadaver, a dissection space was created and maintained by insufflation of CO2. The supraclavicular brachial plexus was dissected using the da Vinci robot (Intuitive Surgical, Sunnyvale, CA). A segment of the C5 nerve root was grafted robotically. A series of eight clinical cases of nerve damage around the shoulder girdle were operated on using the da Vinci robot. The ability to perform successful microneural repair was confirmed in both the authors' clinical and experimental studies, but the entire potential of robotically assisted microneural surgery was not realized during these initial cases because an open incision was still required. Robotic-assisted surgery of the shoulder girdle and brachial plexus is still in its early stages. It would be ideal to have even finer and more suitable instruments to apply fibrin glue or electrostimulation in nerve surgery. Nevertheless, the prospects of minimally invasive techniques would allow acute and subacute surgical approach of traumatic brachial plexus palsy safely, without significant and cicatricial morbidity.