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Prevalence of Early Minor and Major Complications After Reverse Shoulder Arthroplasty According to the Pathology in Treatment and Comorbidities

Objective To assess the prevalence of early minor and major complications (MMC) of reverse shoulder arthroplasty (RSA) according to the underlying pathology responsible for the surgical indication. Methods Between August 2009 and September 2015, 75 shoulders were submitted to RSA. Revision surgeries and patients with less than 2 months of follow-up were excluded. We analyzed 72 shoulders. The cuff tear arthropathy (CTA) represented 56.9% of cases and proximal humeral 4-part fractures (4PF) represented 13.8%. The index of MMC was analyzed according to the indication of basic pathology and the presence of rheumatoid arthritis, diabetes mellitus, and obesity. Results The evaluation was performed with a median of 11.5 months. Minor complications were found in 14 patients (19.4%) and major complications in 29 patients (40.3%). The statistical analysis was performed adding the contents of MMC—47.2%. In CTA patients, there were 43.9% (18/41) of MMC. In all other joint diseases, there were 51.6% (16/31) MMC. There was no statistical difference in the prevalence of MMC among the cases of CTA and the other diseases. There was a tendency, although not significant, of lower prevalence of MMC in cases of 4PF compared to CTA patients. Patients with rheumatoid arthritis and diabetes mellitus did not present with a higher prevalence of MMC, and obesity significantly increased the prevalence of MMC. Conclusion It was not possible to demonstrate a higher prevalence of MMC according to the pathology being treated. The presence of obesity significantly increased the prevalence of MMC. Rheumatoid arthritis and diabetes mellitus did not increase the prevalence of MMC.