Conclusions 1 . It was common that PEEPi existed in patients with Cor pulmonale during mechanic ventilation .

结论（1）肺心病急性发作期机械通气患者普遍存在PEEPi；

Results : 7 out of 15 moderate COPD patients and 18 out of 21 severe COPD patients had PEEPi .

结果：15例中度COPD病人中的7例和21例重度COPD病人中的18例存在PEEPi。

Although PEEPi were higher in the lung protective ventilation group , the difference was not significant ( P > 0.05 ) .

肺保护性通气组的PEEPi略高于传统通气组，差异无统计学意义（P>0.05）；

Results ( 1 ) The intrinsic positive end-expiratory pressure ( PEEPi ) in COPD is associated with the angle of peak expiratory flow and the end flow of expiratory .

结果（1）COPD患者的内源性呼气末正压与呼气峰夹角和呼气末流速明显相关。

There were no significant differences between groups in arterial carbon dioxide pressure ( PaCO_2 ), pH values , blood pressure , heart rates , plat pressure and PEEPi during treatment ( all P > 0.05 ) .

两组动物pH值、心率、血压、平台压、PEEPi和动脉血二氧化碳分压（PaCO2）比较差异均无统计学意义（P均>0.05）。