• James B Reilly, Jennifer S Myers, Doug Salvador, and Robert L Trowbridge.
• 1Associate Program Director, Internal Medicine Residency Allegheny General Hospital- West Penn Hospital Educational Consortium, Pittsburgh, PA, USA; and Assistant Professor of Medicine, Temple University School of Medicine, Philadelphia, PA, USA.
• Diagnosis (Berl). 2014 Jun 1; 1 (2): 167-171.

AbstractDiagnostic errors comprise a critical subset of medical errors and often stem from errors in individual cognition. While traditional patient safety methods for dissecting medical errors focus on faulty systems, such methods are often less useful in cases of diagnostic error, and a broader cognitive framework is needed to ensure a comprehensive analysis of these complex events. The fishbone diagram is a widely utilized patient safety tool that helps to facilitate root cause analysis discussions. This tool was expanded by the authors to reflect the contributions of both systems and individual cognitive errors to diagnostic errors. We describe how two medical centers have applied this modified fishbone diagram to approach diagnostic errors in a way that better meets the patient safety and educational needs of their respective institutions.

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