• Sultana A Qureshi, Terence Ahern, Ryan O'Shea, Lorien Hatch, and Sean O Henderson.
• Department of Emergency Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, California 90033, USA.
• J Emerg Med. 2012 Jan 1;42(1):74-8.

BackgroundRecent studies suggest that time of day affects survival from in-hospital cardiac arrest. Lower survival rates are observed during nights and on weekends, except in areas with consistent physician care, such as the Emergency Department. Since 1997, our hospital has utilized a standard, hospital-wide "Code Blue Team" (CBT) to respond to cardiac arrests at any time. This team is always led by an emergency physician, and includes specially trained nurses.ObjectiveTo assess if time of day or week affects survival from in-hospital cardiac arrest when a trained, consistent, emergency physician-led CBT is implemented.MethodsThis is an analysis of prospectively collected data on initial survival rates (return of spontaneous circulation >20 min) of all cardiac arrests that were managed by the CBT from 2000 to 2008. Cardiac arrests were also subcategorized based on initial cardiac rhythm. Survival rates were compared according to time of day or week.ResultsA total of 1692 cardiac arrests were included. There was no significant difference in the overall rate of initial survival between day/evening vs. night hours (odds ratio [OR] 1.04, 95% confidence interval [CI] 0.83-1.29), or between weekday vs. weekend hours (OR 1.10, 95% CI 0.85-1.38). This held true for all cardiac rhythms.ConclusionAt our institution, there is no significant difference in survival from cardiac arrest when a standardized "Code Blue Team" is utilized, regardless of the time of day or week.Copyright © 2012. Published by Elsevier Inc.

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