Emergency Nurses treat patients in emergency situations where they’re experiencing trauma or injury. These nurses quickly recognize life-threatening problems and are trained to help solve them on the spot. They can work in hospital emergency rooms, ambulances, helicopters, urgent care centers, sports arenas, and more. Critical Care Nurses make sure all critically ill patients get optimal care for their illnesses and injuries. To do that, they use their specialized skills as well as their in-depth knowledge of the human body and the latest technology in the field. Most Critical Care Nurses work in hospitals, but they can work out of nursing homes, outpatient facilities and flight units, too.