院内下呼吸道感染是常见的医院感染。全身麻醉气管插管术后发生的下呼吸道感染在我院已引起重视。虽然对麻醉器械进行了消毒管理,但仍有较高发病率。从感染病例痰培养结果分析发现:革兰阴性杆菌是其主要致病菌。由于消化道是革兰阴性杆菌最常寄生部位。因此推测吸入消化道分泌 Nosocomial lower respiratory tract infection is a common nosocomial infection. Lower respiratory tract infection that occurs after general anesthetic tracheal intubation has attracted attention in our hospital. Although anesthesia equipment was sterilized, there was still a high incidence. Analysis of sputum culture results from infected cases found that Gram-negative bacilli were the major pathogens. Because the digestive tract is the most common parasitic sites Gram-negative bacilli. So presumably inhaled digestive tract secretion