Emergency Medicine is a medical specialty involving care for adult and pediatric patients with acute illnesses or injuries which require immediate medical attention. While not usually providing long-term or continuing care, Emergency Medicine Physiciansdiagnose a variety of illnesses and undertake acute interventions to resuscitate and stabilize patients. Emergency Medicine Physicians practice in hospital emergency departments, pre-hospital settings via emergency medical services, other locations where initial medical treatment of illness takes place, and recently the intensive-care unit. Just as clinicians operate by immediacy rules under large emergency systems, emergency practitioners aim to diagnose emergent conditions and stabilize the patient for definitive care.