APACHE II score of two group after treatment were lower than that before treatment , and lactic group decreased more obviously compared with control group ( 14.25 5.29 vs. 20.00 9.74 , t = 2.298 , P = 0.026 ; 13.60 6.18 vs 18.15 6.62 , t = 2.653 , P = 0.011 ) .