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随着ICU建立与机械通气（mechanicalvenhlation，MV）的普遍应用，与呼吸机相关的院内感染肺炎日渐增多。呼吸机相关肺炎（ventilalor-associatepneumonia，VAP）是指原无肺部感染的呼吸衰竭患者，在气管插管MV治疗后48h，或拔管48h以内发生的肺部感染，它是急性呼吸衰竭患者常
With the widespread use of ICU establishment and mechanical ventilation (MV), pneumonia associated with ventilator-associated nosocomial infections is on the rise. Ventilator-associated pneumonia (VAP) refers to patients with respiratory failure without pulmonary infection, pulmonary infection 48h after tracheal intubation MV treatment or extubation within 48h, it is often in patients with acute respiratory failure