Mass Casualty Incidents (Emergency Nursing) integrates university-level emergency nursing with RN practice: first nursing action, red flags, stabilization priorities, diagnostics, emergency medications, communication, safety risks, NCLEX traps, and case-based judgment. Canadian items may reference provincial trauma systems, Canadian Triage and Acuity Scale (CTAS), and institutional stroke/sepsis protocols; emergency nursing logic matches NCLEX-RN. Pathway context (RN, Canada). Continue with related lessons from the pathway lesson hub. Learning objectives - Apply first nursing action, red flags, stabilization priorities, diagnostics, emergency medications, communication, safety risks, NCLEX-style traps, and case-based judgment for this topic. - Use primary survey ABCs before secondary survey or diagnostics when stems mix resuscitation with paperwork. - Integrate time-critical bundles (sepsis, stroke, ACS, anaphylaxis) when emergency vignettes appear.