Sudden illness and injury cannot wait for office hours. An emergency room, or emergency department, is a hospital unit that provides immediate assessment and treatment for acute medical, surgical, and traumatic conditions.

Patients are triaged by severity so that the most unstable are seen first. Teams stabilize airway, breathing, and circulation, perform rapid diagnostics, and decide on admission, transfer, or discharge. Crowding and boarding of admitted patients are persistent operational challenges.

Emergency rooms function as the safety net of the healthcare system, seeing everyone regardless of ability to pay. They manage heart attacks, strokes, major trauma, overdoses, and acute psychiatric crises. Efficient emergency care saves lives and reduces downstream disability.

• Hospital unit for immediate acute care
• Uses triage to prioritize by severity
• Stabilizes, diagnoses, and routes patients onward
• Serves as a continuous-access safety net