ICU is the abbreviation of Intensive Care Unit in English, which means Critical Illness Enhanced Care Unit. Intensive medical care is with the development of medical and nursing profession, the birth of new medical equipment and the improvement of the hospital management system and the emergence of a set of modern medical care technology as one of the forms of medical organization and management. Small and medium-sized hospitals are a ward, and large hospitals are a special department to centralize critically ill patients and give the best protection in terms of manpower, material resources and technology with a view to obtaining good treatment results.