Compared with the group A , the sedation scale ( 1.19 + / - 0.56 vs 1.96 + / - 0.90 ) , nausea score ( 0.59 + / - 0.80 vs 1.81 + / - 0.88 ) , vomiting score ( 0.48 + / - 0.94 vs 1.89 + / - 0.93 ) and mental state score ( 0.96 + / - 0.73 vs 1.69 + / - 0.75 ) were all decreased significantly in the group B ( all P < 0.01 ) .