Primary outcomes
The block operation time and onset time of group F were significantly shorter than those of group S (P < 0.05); the patients in the two groups underwent the surgery under nerve block, no anaesthesia conversion was needed, and the block effect during the operation was better than that of group S (P < 0.05); and the effective analgesia time was significantly longer than that of group S (P < 0.05)(see Table 
Comparison of neural block operation time, onset time, block effect operation time and effective analgesia time between the two groups