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危重病的发生、发展，一方面受致病因素影响，另一方面也与机体应激反应引起的内环境失调关系密切。危重病相关性皮质醇不足（ CIRCI）是指由于高应激状态使皮质醇水平不能满足机体适应疾病严重程度的需要，在感染性休克及急性呼吸窘迫综合征中容易出现，在其他高应激的危重病中也很常见，其机制复杂，与患者的预后密切相关。研究CIRCI有望改善危重病患者的预后，有重要临床意义，是近年来危重病医学研究的热点。“,”Risk factors, especially homeostasis disturbances caused by stress reaction, can affect the occurrence and development of critical illness.Critical illness related corticosteroid insufficiency ( CIRCI) refers to cortisol levels cannot meet the needs of the body caused by high stress,which is common not only in septic shock and acute respiratory distress syndrome,but also other critical illness.The mechanisms of CIRCI are very complicated,and closely associated with prognosis of the patients.The research of CIRCI is of great clinical significance,which may help to improve the prognosis,and has become a hot spot in the field of criti-cal care medicine.