Posterior Shoulder Instability After Infraclavicular Block for Outpatient Hand Surgery

Regional blocks are being increasingly utilized for anesthesia for various orthopedic procedures. Several studies have shown that regional anesthesia has fewer side effects and improved postoperative pain relief compared to general anesthesia, but regional blocks are not without risks. We present case reports of 2 patients who experienced posterior shoulder instability, one of whom had a posterior shoulder dislocation, immediately in the postanesthesia care unit after undergoing hand surgery with regional anesthesia. This paper highlights the importance of being aware that patients might be at increased risk of shoulder instability after upper extremity regional anesthesia, and appropriate perioperative precautions should be taken.

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Non-operative Management of Posterior Shoulder Instability: An Assessment of Survival and Predictors for Conversion to Surgery at 1 to 13 Years After Diagnosis

Orthopaedic Journal of Sports Medicine ◽

10.1177/2325967118s00098 ◽

2018 ◽

Vol 6 (7_suppl4) ◽

pp. 2325967118S0009

Author(s):

Jarret Murray Woodmass ◽

Julia Lee ◽

Nick R. Johnson ◽

Christopher L. Camp ◽

Diane L. Dahm ◽

...

Keyword(s):

Shoulder Instability ◽

Radiographic Progression ◽

Surgical Intervention ◽

Cox Proportional Hazards ◽

Posterior Shoulder Instability ◽

Late Failure ◽

Posterior Shoulder ◽

Increased Risk ◽

History Of

Objectives: Among patients treated non-operatively for 1 year following a diagnosis of posterior shoulder instability (PSI), little is known about the the incidence of surgery between 1-13 years after injury. The purpose of this study is to define the frequency and evaluate the factors predictive for late surgical intervention of symptomatic PSI. Methods: This study included a population-based cohort of 115 patients (14 females, 101 males) diagnosed with PSI between January 1994 and July 2012 with a minimum 5-years follow-up (mean:13.9 years; range: 5-23 years). Landmark survival analysis was performed to evaluate incidence of surgery after 1 year. Survival was estimated using Kaplan Meier method and predictors of late surgical intervention were analyzed using Cox proportional hazards regression. Results: A total of 61/115 (53%) patients were treated non-operatively for 1 year following diagnosis of PSI. Of these, 24/61 (39%) converted to surgery for symptomatic PSI. The overall survival free of surgery at 1 and 5 years was 53.0% (95% CI 434.7-63.0) and 37.1% (95% CI 29.1-47.1), respectively. BMI >35 (p=0.04, HR 3.3) was predictive for late conversion to surgery. Age, gender, occupation, or history of glenohumeral dislocation were not significant. Assessing surgery as a time dependent covariate, a patient undergoing surgery was at an increased risk for radiographic progression of osteoarthritis (p=0.02, HR=4.0, 95% CI 1.2-13.2). Conclusion: Conservative management was performed for at least one year in over half of patients diagnosed with PSI. However, long-term follow-up demonstrates that nearly 40% of these patients eventually require surgery. Increased BMI was predictive for late failure of while age, gender, history of dislocation and occupation did not show an effect. Patients who underwent surgery were at an increased risk of radiographic progression of arthritis.

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Differences in Outcomes Between Anterior and Posterior Shoulder Instability After Arthroscopic Bankart Repair: A Systematic Review and Meta-analysis

Orthopaedic Journal of Sports Medicine ◽

10.1177/23259671211006437 ◽

2021 ◽

Vol 9 (5) ◽

pp. 232596712110064

Author(s):

Matthew L. Vopat ◽

Reed G. Coda ◽

Nick E. Giusti ◽

Jordan Baker ◽

Armin Tarakemeh ◽

...

Keyword(s):

Systematic Review ◽

Shoulder Instability ◽

Anterior Shoulder Instability ◽

Posterior Shoulder Instability ◽

Anterior Instability ◽

Posterior Instability ◽

Female Patients ◽

Posterior Shoulder ◽

Male Patients ◽

Postoperative Instability

Background: The glenohumeral joint is one of the most frequently dislocated joints in the body, particularly in young, active adults. Purpose: To conduct a systematic review and meta-analysis to evaluate and compare outcomes between anterior versus posterior shoulder instability. Study Design: Systematic review; Level of evidence, 4. Methods: A systematic review was performed using the PubMed, Cochrane Library, and MEDLINE databases (from inception to September 2019) according to PRISMA (Preferred Reporting Items for Systematic Reviews and Meta-Analyses) guidelines. Studies were included if they were published in the English language, contained outcomes after anterior or posterior shoulder instability, had at least 1 year of follow-up, and included arthroscopic soft tissue labral repair of either anterior or posterior instability. Outcomes including return-to-sport (RTS) rate, postoperative instability rate, and pre- and postoperative American Shoulder and Elbow Surgeons (ASES) scores were recorded and analyzed. Results: Overall, 39 studies were included (2077 patients; 1716 male patients and 361 female patients). Patients with anterior instability had a mean age of 23.45 ± 5.40 years (range, 11-72 years), while patients with posterior instability had a mean age of 23.08 ± 8.41 years (range, 13-61 years). The percentage of male patients with anterior instability was significantly higher than that of female patients (odds ratio [OR], 1.36; 95% CI, 1.04-1.77; P = .021). Compared with patients with posterior instability, those with anterior instability were significantly more likely to RTS (OR, 2.31; 95% CI, 1.76-3.04; P < .001), and they were significantly more likely to have postoperative instability (OR, 1.53; 95% CI, 1.07-2.23; P = .018). Patients with anterior instability also had significantly higher ASES scores than those with posterior instability (difference in means, 6.74; 95% CI, 4.71-8.77; P < .001). There were no significant differences found in postoperative complications between the anterior group (11 complications; 1.8%) and the posterior group (3 complications; 1.6%) (OR, 1.12; 95% CI, 0.29-6.30; P = .999). Conclusion: Patients with anterior shoulder instability had higher RTS rates but were more likely to have postoperative instability compared with posterior instability patients. Overall, male patients were significantly more likely to have anterior shoulder instability, while female patients were significantly more likely to have posterior shoulder instability.

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