• James Barger, Derek S Stenquist, Amin Mohamadi, Michael J Weaver, DyerGeorge S MGSMBrigham and Women's Hospital, 75 Francis St, Boston, MA 02215, USA., and Arvind von Keudell.
• Harvard Combined Orthopedic Residency Program, 55 Fruit St, WH 535, Boston, Massachusetts 02114, USA. Electronic address: jbarger@mgh.harvard.edu.
• Injury. 2021 Aug 1; 52 (8): 2272-2278.

ObjectivesProximal humerus fractures (PHF) are common, yet their optimal management remains debated. Reverse total shoulder arthroplasty (rTSA) is an increasingly popular option, particularly for non-reconstructible or osteoporotic fractures. Despite this trend, current literature provides limited guidance with regards to surgical timing and patient selection for rTSA. A trial of non-operative management might be beneficial for many patients who are not clearly indicated for surgery, provided this does not have a major negative impact on results for those who ultimately require rTSA. The purpose of this study was to investigate whether delayed reverse shoulder arthroplasty for fracture (>28 days from injury) is associated with any difference in complication rates or functional outcomes relative to acute surgery.DesignRetrospective cohort study PATIENTS/PARTICIPANTS: 114 consecutive patients who underwent rTSA as the primary management of a PHF at two Level 1 trauma centers and one academic community hospital between 2004 and 2016.InterventionrTSA as primary management of proximal humerus fracture MAIN OUTCOME MEASUREMENTS: Complications, range of motion, and patient-reported functional outcomes scores (DASH, PROMIS physical function, and EQ-5D) RESULTS: Eighty-two of 114 patients (72%) underwent early surgery. Complex (4-part, head-split, dislocated) fractures were significantly more common in the acutely treated group. There was no significant difference in complications. Overall complication rate was 11.4%. There was a significant difference in DASH score favoring early surgery, with an average score of 22.4 in acutely treated patients versus 35.1 in delayed patients (p = 0.034). There was a non-statistically significant trend towards better PROMIS physical function scores and ROM in the acutely treated group.ConclusionDelay in performing primary rTSA for management of PHF does not lead to an increase in complication rates but it may come at the cost of worse functional outcomes in patients who ultimately require rTSA.Copyright © 2021 Elsevier Ltd. All rights reserved.

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