• James E Paul, Norman Buckley, Richard F McLean, Karen Antoni, David Musson, Marianne Kampf, Diane Buckley, Michelle Marcoux, Rosemary Frketich, Lehana Thabane, and Ji Cheng.
• From the Department of Anesthesia (J.E.P., N.B., R.F.M., L.T., D.M., J.C.) and Department of Clinical Epidemiology & Biostatistics (L.T.), McMaster University (K.A.), Hamilton, Ontario, Canada; Acute Pain Service-NP, St. Joseph's Healthcare (K.A.), Hamilton, Ontario, Canada; Clinical Practice and Education (M.K.), Hamilton Health Sciences (D.B., M.M.), Hamilton, Ontario, Canada; Advisor Health System Transformation, Hamilton Niagara Haldimand Brant Local Health Integration Network (R.F.), Grimsby, Ontario, Canada.
• Anesthesiology. 2014 Jan 1;120(1):97-109.

BackgroundAlthough intravenous patient-controlled analgesia opioids and epidural analgesia offer improved analgesia for postoperative patients treated on an acute pain service, these modalities also expose patients to some risk of serious morbidity and even mortality. Root cause analysis, a process for identifying the causal factor(s) that underlie an adverse event, has the potential to identify and address system issues and thereby decrease the chance of recurrence of these complications.MethodsThis study was designed to compare the incidence of adverse events on an acute pain service in three hospitals, before and after the introduction of a formal root cause analysis process. The "before" cohort included all patients with pain from February 2002 to July 2007. The "after" cohort included all patients with pain from January 2009 to December 2009.ResultsA total of 35,384 patients were tracked over the 7 yr of this study. The after cohort showed significant reductions in the overall event rate (1.47 vs. 2.35% or 1 in 68 vs. 1 in 42, the rate of respiratory depression (0.41 vs. 0.71%), the rate of severe hypotension (0.78 vs. 1.34%), and the rate of patient-controlled analgesia pump programming errors (0.0 vs. 0.08%). Associated with these results, the incidence of severe pain increased from 6.5 to 10.5%. To achieve these results, 26 unique recommendations were made of which 23 being completed, 1 in progress, and 2 not completed.ConclusionsFormal root cause analysis was associated with an improvement in the safety of patients on a pain service. The process was effective in giving credibility to recommendations, but addressing all the action plans proved difficult with available resources.

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