At the point of @ minutes after turning to the lateral position and @ minutes after two lung ventilation , Ppeak and Cdyn of two groups were significantly different ( P < @ ) ( Ppeak :@ @ cmH ( @ ) O , @ @ cmH ( @ ) O for VCV group and @ @ cmH ( @ ) O , @ @ cmH ( @ ) O for PCV-VG group ; Cdyn : @ @ ml/cmH ( @ ) O , @ @ ml/cmH@O for VCV group and @ @ ml/cmH ( @ ) O , @ @ ml/cmH ( @ ) O for PCV-VG group ) .