• Rongwei Fu, Denise Foster, Daniel A Handel, Taketo Watase, and Denise Langley.
• Center for Policy and Research in Emergency Medicine, Oregon Health and Science University, Portland, OR, USA. wataset@ohsu.edu
• Am J Emerg Med. 2012 Oct 1;30(8):1329-35.

ObjectiveThe objective of this study was to assess the impact of an emergency department (ED)-only full-capacity protocol and diversion, controlling for patient volumes and other potential confounding factors.MethodsThis was a preintervention and postintervention cohort study using data 12 months before and 12 months after the implementation of the protocol. During the implementation period, attending physicians and charge nurses were educated with clear and simple figures on the criteria for the initiation of the new protocol. A multiple logistic regression model was used to compare ambulance diversion between the 2 periods.ResultsThe proportion of days when the ED went on diversion at least once during a 24-hour period was 60.4% during the preimplementation period and 20% in the postimplementation periods (P < .001). In the multivariate logistic regression model, the use of the new protocol was significantly associated with decreased odds of diversion rate in the postimplementation period (odds ratio, 0.32; 95% confidence interval, 0.21-0.48).ConclusionOur predivert/full-capacity protocol is a simple and generalizable strategy that can be implemented within the boundaries of the ED and is significantly associated with a decreased diversion rate.Copyright © 2012 Elsevier Inc. All rights reserved.

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