本研究旨在评价稳定状态下呼气终末加压(PEEP)对右室功能的影响和排除机械通气引起的循环改变,同时进一步了解呼吸暂停期间不同气道压(0、10、20和30cmH_2O)水平时的右室功能。选15例腹部大手术及严重创伤后发生急性肺损伤需进行机械通气的病人,用热稀 This study was designed to evaluate the effect of end-expiratory pressure (PEEP) on right ventricular function under steady-state conditions and to exclude circulatory changes due to mechanical ventilation, and to further understand the effects of different airway pressures (0, 10, 20 and 30 cmH2O Right ventricular function when level. Select 15 cases of abdominal surgery and acute trauma after acute trauma patients need mechanical ventilation, with hot dilute