Compared with VCV group , PCV-VG group showed a lower Ppeak 15 minutes and 60 minutes after OLV [ ( 17 2 cmH ( 2 ) O ) vs ( 22 4 cmH ( 2 ) O ) and ( 18 4 cmH ( 2 ) O ) vs ( 23 3 cmH ( 2 ) O ) with a higher Cdyn at the same point ( 38.6 6.3 ml/cmH ( 2 ) O ) vs ( 29.6 3.2 ml/cmH ( 2 ) O ) and 37.3 6.0 ml/cmH ( 2 ) O ) vs ( 30.3 3.8 ml/cmH ( 2 ) O ) ] ( P < 0.01 ) .