Anrikefon Injection for Postoperative Analgesia in Thoracoscopic Lung Surgery: A Randomized, Double-Blind, Active-Controlled, Parallel-Group, Single-Center Clinical Study

This is a randomized, double-blind, active-controlled clinical study evaluating the efficacy and safety of Anrikefon (HSK21542) Injection for patient-controlled analgesia (PCA) in patients undergoing thoracoscopic lung surgery. Subjects aged 18-85 years with a postoperative resting NRS score ≥ 4 will be enrolled. Eligible participants will be randomized 1:1 to receive either Anrikefon (HSK21542) or sufentanil via PCA pump for 24 hours post-surgery. The primary endpoint is the 24-hour summed pain intensity difference (SPID₂₄). A total of 88 subjects are planned for enrollment. The study has received ethics committee approval.