Chapter 4 DISCUSSIO N 4.1 General Features 4.2 Effective postoperative pain relief 4.2.1 VAS-based assessment * VAS scores at resting time From table 3.8, the resting VAS scores of the two groups at H0 were both 4 points higher with the mean of the two groups respectively 5.3 ± 0.9 in bupivacaine group and 5.17 ± 0.65 in ropivacaine group.