Group comparison of analgesic effects
pain
The VAS scores for analgesic evaluation at 2 h, 12 h, and 24 h after extubation were compared among the four groups of patients. As shown in Fig. The time to use the first pain medication after surgery in the four groups was compared by one-way ANOVA. As shown in Fig. 
Comparison of VAS scores (
Cases of the use of postoperative analgesics at different time points after extubation among the four groups [n(%)]