各种侵入性治疗在危重病患者抢救中是必不可少的治疗手段。然而在急诊情况下，由于抢救的主要目的是为了尽快挽救患者的生命，加之人员流动大、环境简陋以及操作仓促等因素影响，常忽视对感染的处理和预防。尤其是医源性因素更是导致患者继发院内感染并影响抢救存活率的主要原 A variety of invasive treatment in critically ill patients is an essential treatment. However, in the case of emergency, the main purpose of the rescue is to save the lives of patients as soon as possible, coupled with factors such as large staff turnover, poor environment and hasty operation, the treatment and prevention of infections are often ignored. In particular, iatrogenic factors are the main cause of secondary nosocomial infection and affect the survival rate of patients