Teres minor muscle hypertrophy is a negative predictor of outcomes after reverse total shoulder arthroplasty: an evaluation of preoperative magnetic resonance imaging and postoperative implant position.

Autor: Hung LW; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA; Department of Orthopedic Surgery, Shin Kong Wu Ho-Su Memorial Hospital, Taipei City, Taiwan; School of Medicine, College of Medicine, Fu Jen Catholic University, New Taipei City, Taiwan., Wu S; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA; Department of Orthopedic Surgery, The Second Affiliated Hospital, Fujian Medical University, Quanzhou, China., Lee A; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA., Zhang AL; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA., Feeley BT; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA., Xiao W; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA; Department of Orthopaedic Surgery, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China., Ma CB; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA., Lansdown DA; Department of Orthopedic Surgery, University California San Francisco, San Francisco, CA, USA. Electronic address: Drew.lansdown@ucsf.edu.
Jazyk: angličtina
Zdroj: Journal of shoulder and elbow surgery [J Shoulder Elbow Surg] 2021 Oct; Vol. 30 (10), pp. e636-e645. Date of Electronic Publication: 2021 Feb 07.
DOI: 10.1016/j.jse.2020.12.020
Abstrakt: Background: Predictors of outcomes after reverse total shoulder arthroplasty (rTSA) remain unclear. The purpose of this study was to analyze the impact of preoperative muscle quality and postoperative implant positioning on patient-reported outcomes following rTSA.
Methods: We evaluated 88 shoulders treated with rTSA in which preoperative magnetic resonance imaging was available. Preoperative muscle quality was evaluated, including fatty infiltration, rotator cuff muscle volume, and total tear size. Postoperative implant position was determined radiographically. The correlation between imaging parameters and the 2-year postoperative American Shoulder and Elbow Surgeons (ASES) score was examined. Multivariate analyses were performed to adjust for confounding factors including patient demographic characteristics and implant position.
Results: Univariate analysis showed that the ASES score was significantly lower in patients with teres minor muscle hypertrophy relative to those with normal muscle (73.3 ± 22.8 vs. 84.2 ± 16.9, P = .02). The functional subscore was significantly lower in patients with grade 2 fatty infiltration of the deltoid muscle relative to those with grade 0 fatty infiltration (26.1 ± 14.6 vs. 34.8 ± 11.6, P = .03). Older age was associated with a higher pain subscore (ρ = 0.32, P = .002). Multivariate analysis demonstrated that teres minor muscle hypertrophy remained a significant independent predictor of the ASES score (β coefficient = 91.3, P = .03).
Conclusion: Teres minor muscle hypertrophy is an independent negative predictor of patient-reported outcomes after rTSA.
(Copyright © 2021 Journal of Shoulder and Elbow Surgery Board of Trustees. Published by Elsevier Inc. All rights reserved.)
Databáze: MEDLINE
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