An emergency department, also known as an emergency room, is a medical treatment facility specializing in emergency medicine. Emergency medicine is the acute care of patients who present without a prior appointment, either by themselves or by an ambulance. One can find an emergency department in a hospital or primary care centers.
Due to the patient flow's unplanned nature, the ED department must provide initial treatment for a broad spectrum of illnesses and injuries, some of which may be life-threatening and require immediate attention.