Intensive care medicine
（重定向自CICU）
![](/Images/godic/202501/04/Respiratory_therapist2830.jpg")
![Mechanical ventilation may be required if a patient's unassisted breathing is insufficient to oxygenate the blood.](/Images/godic/202501/04/VIP_Bird22830.jpg")
![An endotracheal tube](/Images/godic/202501/04/Sondeintubation2830.jpg")
![Florence Nightingale](/Images/godic/202501/04/Florence_Nightingale_1920_reproduction2830.jpg")
Intensive care medicine or critical care medicine is a branch of medicine concerned with the diagnosis and management of life-threatening conditions requiring sophisticated organ support and invasive monitoring.