APACHEII score , SOFA score , PaO@/FiO@ , ScvO@ , and Lac @ hours after treatment were significantly improved in severe ARDS group compared with control group ( APACHEII score : @ vs. @ , t = @ , P = @ ; SOFA score : @ vs. @ , t = @ , P = @ ; PaO@/FiO@ : @ mmHg vs. @ mmHg , t = @ , P = @ ; ScvO@ : @ vs. @ , t = @ , P = @ ; Lac : @ mmol/L vs. @ mmol/L , t = @ , P = @ ) , while the value of CRP showed no significant difference ( @ mg/L vs. @ mg/L , t = @ , P = @ ) .