Registered nurses mainly focus on patient care. They provide the best care they can, while making themselves indispensable to both doctors and patients. Their care duties include preparatory work before, during and after patient procedures. An RN's duties are often shaped by which specialty area he or she works in. Staff nurses at hospitals make up the largest group of RNs. These nurses provide bedside patient care and are generally assigned to one specific area in the hospital, such as maternity or pediatrics, Intensive care (ICU) or Emergency room (ER), surgery, oncology, and cardiology. Some duties within these wards include giving patients intravenous (IV) lines for fluid, blood or medication, administering medications, conducting diagnostic tests and keeping patients as comfortable as possible. RNs may also aid doctors during exams and procedures and keep records of vital signs and symptoms. RNs regularly rotate among specialties within a hospital to gain experience ...