[RESULTS] The intubation time in A was longer than those of group B ( ( 224 72 ) vs ( 165 46 ) s , P < 0.05 ) , the success rate of intubation ( 100 % vs 85 % , P < 0.05 ) , collapse score in A group was higher than in group B ( 95 % vs 75 % , P < 0.05 ) , Sore throat hoarseness occurred after operation in A group was lower than in B group ( 10 % vs 35 % , P < 0.05 ) , PaO was higher in group A after one lung ventilation for 30 min ( ( 206 58 ) vs ( 148 63 ) mmHg , P < 0.05 ) , PaCO and PAW were lower than group B ( ( 36 4 ) vs ( 45 7 ) mmHg ; ( 21.6 3.2 ) vs ( 29.3 5.5 ) cm HO , P < 0.05 ) .