肺炎占院内感染的15％,病死率高。使用污染的呼吸治疗器械是导致院内革兰氏阴性杆菌肺炎的一个明确原因。作者研究呼吸器回路系统和冷凝液中细菌移生(Colonization)的来源、速度与程度。方法研究对象为波士顿市立医院持续使用机械呼吸器的内外科ICU病人,经随机抽样,由专人采集 Pneumonia accounts for 15% of nosocomial infections and has a high case fatality rate. The use of contaminated respiratory equipment is a clear cause of Gram-negative bacilli in the hospital. The authors studied the origin, speed, and extent of bacterial colonization in the ventilator circuit system and condensate. METHODS Subjects were surgical and surgical ICU patients in continuous use of mechanical respirators at Boston Civic Hospital who were randomly sampled and collected by hand