With the development of medical care professionals, introduction of new medical devices and improvement of hospital management systems, the intensive care unit (ICU) has been emerging as a medical organization and management mode that integrates modern medical care techniques. The branches include pediatric intensive care unit (PICU), neonatal intensive care unit (NICU), medical intensive care unit (MICU), coronary care unit (CCU), cardiac surgery intensive care unit (CICU), emergency intensive care unit (EICU) and psychosurgical intensive care unit (NSICU).