Table IV.

Pulmonary surfactant and D/W ratio changes after ALI induction.

Group	SatPC/TPL	SatPC/TP	D/W
C	0.62±0.08	0.67±0.29	0.21±0.01
H	0.44±0.14a	0.28±0.11a	0.17±0.02a
S	0.31±0.13a	0.14±0.04a,b	0.18±0.01
ES	0.49±0.08a,c	0.29±0.16a,c	0.20±0.02

Data are presented as the mean ± standard deviation. SatPC/TPL and SatPC/TP ratios represented the activity of pulmonary surfactant.

^aP<0.05 vs. Group C

^bP<0.05 vs. Group H; and

^cP<0.05 vs. Group S. D/W, dry weight/wet weight ratio of lung tissue; ALI, acute lung injury; SatPC, saturated phosphatidylcholine; TP, total protein; TPL, total phospholipid; C, control group; H, hypoxia group; S, sevoflurane group; ES, combined sevoflurane-epidural anesthesia group.