Fig. 2

Use of PCA after surgery within the first 3 days after VATS. (A) Cumulative consumption of fentanyl. (B) Successful number of deliveries. Data are presented as medians with error bars showing the interquartile range. DS (green), placebo (orange). DS, dinalbuphine sebacate; RR, recovery room; POD, postoperative day; AM, Ante Meridiem; PM, Post Meridiem; **: p < 0.01; ***: p < 0.001