呼吸机相关性肺炎(Ventilator associated pneu-monia,VAP)是机械通气(Mechanical ventilator,MV)常见的并发症,也是呼吸衰竭患儿发生院内感染、死亡率增高、撤机时间延长和治疗费用增加的重要原因[1],而围产期新生儿更易患此病,这与该期患儿的生理特点有关。为探讨围产期新生 Ventilator associated pneu-monia (VAP) is a common complication of mechanical ventilator (MV) and is associated with nosocomial infections, increased mortality, prolonged weaning, and increased cost of treatment in children with respiratory failure An important reason [1], and perinatal newborns are more susceptible to the disease, which is related to the physiological characteristics of children in this period. To explore perinatal freshmen