3.1.8 Surgical procedures Figure 3.2: Distribution of surgery type of two groups 15 3.2 Effective postoperative pain relief 3.2.1 VAS score at rest time at study times Chart 3.3: VAS score change at break of two groups Before the initiation of pain relief, the bupivacaine group had a mean VAS score of 5.3 ± 0.9, higher than that of the ropivacaine group of 5.1 ± 0.65.