• Lauren T Southerland, Steffen R Simerlink, Anthony J Vargas, Margaret Krebs, Lalitha Nagaraj, Krystin N Miller, Eric J Adkins, and Michael G Barrie.
• Department of Emergency Medicine, The Ohio State University Wexner Medical Center, Columbus, OH, USA. Electronic address: https://twitter.com/LSGeriatricEM.
• Am J Emerg Med. 2019 Oct 1; 37 (10): 1864-1870.

ObjectiveEmergency Department Observation Units (Obs Units) provide a setting and a mechanism for further care of Emergency Department (ED) patients. Our hospital has a protocol-driven, type 1, complex 20 bed Obs Unit with 36 different protocols. We wanted to understand how the different protocols performed and what types of care were provided.MethodsThis was an IRB-approved, retrospective chart review study. A random 10% of ED patient charts with a "transfer to observation" order were selected monthly from October 2015 through June 2017. This database was designed to identify high and low functioning protocols based on length of stays (LOS) and admission rates.ResultsOver 20 months, a total of 984 patients qualified for the study. The average age was 49.5 ± 17.2 years, 57.3% were women, and 32.3% were non-Caucasian. The admission rate was 23.5% with an average LOS in observation of 13.7 h [95% CI 13.3-14.1]. Thirty day return rate was 16.8% with 5.3% of the patients returning to the ED within the first 72 h. Thirty six different protocols were used, with the most common being chest pain (13.9%) and general (13.2%). Almost 70% received a consultation from another service, and 7.2% required a procedure while in observation. Procedures included fluoroscopic-guided lumbar punctures, endoscopies, dental extractions, and catheter replacements (nephrostomy, gastrostomy, and biliary tubes).ConclusionsAn Obs Unit can care for a wide variety of patients who require multiple consultations, procedures, and care coordination while maintaining an acceptable length of stay and admission rate.Copyright © 2019 Elsevier Inc. All rights reserved.

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