Methods: Respiratory rate(RR),tidal volume(VT),minute volume(VE),airways resistance(Raw),respiratory system compliance(Crs),P0.1,intrinsic positive end-expiratory pressure(PEEPi)were measured in 61 COPD patients with mechanical ventilation at the bedside.

• 方法 :对准备撤机的COPD患者61例 ；床旁监测呼吸频率(RR)、潮气量(V T)、分钟通气量(V E)、气道阻力(R aw)、顺应性(Crs)、气道闭合压(P0.；1)、内源性呼气末正压 (PEEPi) ;