Managing the Triage Error Crisis in Emergency Departments

Emergency Department (ED) triage error is endemic. The largest study of ED triage accuracy ever conducted (Sax et al., JAMA Network Open, 2023; n = 5,315,176) found mistriage in approximately one-third of encounters using the Emergency Severity Index (ESI), with only 66% sensitivity for critically ill patients. Manchester Triage System (MTS) validation studies across the Netherlands, Sweden, and pediatric populations report under-triage rates of 13–25% and over-triage as high as 40% (van der Wulp 2008; Olofsson 2009; Storm-Versloot 2011). Under-triage is independently associated with a three-fold increase in in-hospital mortality (OR 3.0, 95% CI 2.4–3.8) and a two-fold increase in complications (Rogers et al., 2013). These failures persist despite widespread deployment of refined triage scales, EHR-embedded predictive AI, early warning scores (NEWS-2), and clinical decision support alerts; this white paper characterises the documented failure modes of each class of current technology, including the Epic Sepsis Model external-validation collapse (67% sensitivity miss rate at Michigan Medicine; Wong et al., JAMA Intern Med, 2021), NEWS-2 deterioration-detection failures (Allen et al., 2023), and algorithmic bias affecting vulnerable populations (Obermeyer et al., Science, 2019). ERTRIAGE—a clinically validated, AI-powered, process-based triage methodology deployed in 5 Greek public hospitals at TRL 7+—addresses each failure mode through real-time vital-sign integration, site-specific model fine-tuning, generative-AI resource simulation, and explainable LLM reasoning compliant with EU AI Act Article 14. Live deployment data show >97% prediction accuracy against senior-clinician adjudication across >15,000 admissions, 77% reduction in Step-1 triage time, and 45% reduction in unnecessary resource use. The white paper presents 31 published references, a structured failure-mode mapping table, and the regulatory and clinical pathway from current TRL 7 to commercial EU deployment under CE MDR Class IIb certification (target M16, December 2027)...