• Daan Schuur, David Baden, Martijn Roetman, Tom Boeije, Michael Burg, and Nieke Mullaart-Jansen.
• Dijklander Ziekenhuis, Maelsonstraat 3, 1624, NP, Hoorn, the Netherlands. daanschuur@gmail.com.
• BMC Emerg Med. 2020 May 20; 20 (1): 41.

BackgroundAnterior shoulder dislocations (ASD) are commonly seen in Emergency Departments (ED). ED overcrowding is increasingly burdening many healthcare systems. Little is known about factors influencing ED length-of-stay (LOS) for ASD. This study defines the factors influencing ED LOS for ASD patients.MethodsRetrospective chart reviews were performed on all patients ≥12 years admitted with an anterior shoulder dislocation at two regional hospitals in the Netherlands between 2010 and 2016. The electronic patient records were reviewed for baseline patient characteristics, trauma mechanism, reduction methods, medication used, complications and the LOS at the ED. The main objective was determining factors influencing the LOS in patients with an anterior shoulder dislocation at the ED.ResultsDuring the study period, 716 ASD occurred in 574 patients, 374 (65.2%) in males. There were 389 (54.3%) primary ASD; the remainder (327, 45.7%) were recurrent. Median LOS was 92 min (IQR 66 min), with a significantly shorter LOS in those with recurrent dislocations (p < 0.001), younger age group (p < 0.03) and in patients who received no medications in the ED (p < 0.001). Traction-countertraction and leverage techniques were associated with a significant more use of ED medication compared to other techniques. Although the use of more medication might suggest the LOS would be longer for these techniques, we did not find a significant difference between different reduction techniques and LOS.ConclusionTo our knowledge this study is the largest of its kind, demonstrating ED LOS in ASD patients is influenced by age, the need for medication and dislocation history, primary versus recurrent. Notably, we found that biomechanical reduction techniques, which are not primarily traction-countertraction or leverage techniques, e.g. scapular manipulation and Cunningham, were associated with less ED medication use. Further research is needed to define how reduction methods influence ED medication use, patient satisfaction and ED throughput times.

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