Fig. 3

Comparison of the MBS scores for epidural anaesthesia. Group R: epidural anaesthesia with 0.75% ropivacaine; Group MR: epidural anaesthesia with 0.75% ropivacaine + 2% mepivacaine (Volume 1:1); Group M: epidural anaesthesia with 2% mepivacaine; The MBS scores in Group R or Group MR were higher than those in Group M, while there was no significant difference between Group R and Group MR immediately after surgery. At 0.5 h after surgery, the MBS scores were higher in Group R than in Group M, while there were no difference comparing Group R with Group MR or Group M with Group MR. At 1 h, 2 h or 4 h after surgery, the MBS scores were higher in Group R than in Group M or Group MR, and there were no significant differences between Group M and Group MR