Emergency departments face a high risk of diagnostic error because of rapid decision-making, interrupted workflows, and variable access to diagnostics. Causes include cognitive biases such as premature closure, system failures like poor test result follow-up, and organizational factors including crowding and hierarchical cultures that discourage speaking up. Consequences range from delayed or missed treatment to avoidable harm, increased costs, and loss of patient trust. The National Academies of Sciences, Engineering, and Medicine recommended shifting from blaming individuals to strengthening systems to reduce these harms.
System-level interventions
Effective strategies target workflows and information systems. Closed-loop test result management and standardized handoff protocols reduce missed follow-up care, a point emphasized by Hardeep Singh Baylor College of Medicine in research on diagnostic safety. Clinical decision support embedded in electronic health records helps clinicians consider alternative diagnoses and follow guidelines at the point of care; evidence collected by the Agency for Healthcare Research and Quality supports deployment of decision tools that are tailored to ED workflows. Technology is not a panacea, however, and must be integrated to avoid alert fatigue and to respect clinicians’ time pressures.
Cognitive and team strategies
Interventions that address clinician reasoning and team dynamics are complementary. Structured diagnostic processes such as deliberate differential diagnosis checklists and diagnostic timeouts can mitigate common biases, a strategy highlighted in analyses by David E. Newman-Toker Johns Hopkins University examining misdiagnosis in acute conditions. Promoting team communication and flattening hierarchies encourage junior staff to voice concerns about atypical presentations, which is especially relevant in cultural environments where deference limits challenge. Training alone without supportive systems often has limited impact.
Sustained improvement requires measurement and feedback loops. Routine audit and feedback on diagnostic performance, morbidity and mortality reviews focused on systems, and local learning collaboratives foster a culture of safety. In resource-limited or rural settings, reliance on telemedicine for specialty consultation and targeted point-of-care testing can reduce variability in diagnostic capability, while acknowledging territorial disparities in access. Combining human factors approaches, robust information systems, and organizational commitment to continuous learning creates the greatest potential to lower diagnostic errors in emergency departments and to reduce preventable patient harm.