Emergency Room Registered Nurses work in critical care emergency facilities to assist doctors and work with emergency medical technicians in helping people in pain and possible life-threatening trauma. ER nurses work as part of a team with physicians, other nurse and healthcare professionals to provide care, monitor health conditions, plan long-term care needs, administer medicine, use medical equipment, perform minor medical operations, and advise patients and their families on illness, care and continued care after a hospital stay. ER nurses must be able to prioritize care based on its critical nature.