Effect of esketamine-based patient-controlled intravenous analgesia on postoperative pain and quality of recovery after video-assisted thoracoscopic lobectomy: A prospective, double-blind, randomized controlled trial

OBJECTIVE: This double-blinded randomized study aimed to investigate the effects of esketamine-based patient-controlled intravenous analgesia (PCIA) on postoperative analgesia and quality of recovery in patients undergoing video-assisted thoracoscopic (VATS) lobectomy. METHODS: Patients undergoing selective VATS lobectomy were enrolled and randomly assigned (1:1) to receive PICA with 1.5 mg/kg esketamine (group K) or 1.5 mg/kg sufentanil (group S). Pain intensity was evaluated using the short-form of the McGill Pain Questionnaire (SF-MPQ) and the visual analog scale (VAS). The primary endpoint was the SF-MPQ score of patients on postoperative day 1. RESULTS: Between December 2021 and May 2022, 84 eligible patients received the allocated treatment, with 80 patients (40 per group) ultimately included in the analysis. The total SF-MPQ score in group K was lower than that in group S on postoperative day 1 (P < 0.001) and day 2 (P < 0.001). Additionally, the VAS-rest, VAS-movement and patients' depression-related scores in group K were all significantly lower than those in group S on postoperative day 1 (P = 0.012, P = 0.008 and P = 0.009, respectively) and day 2 (all P < 0.001), whereas the postoperative recovery quality was significantly higher in group K than that in group S on postoperative days 1 and 2 (both P < 0.001). A lower incidence of total adverse events (AEs) was observed in group K than in group S (15% vs. 35%, P = 0.039). CONCLUSION: The use of 1.5 mg/kg esketamine in PCIA for postoperative analgesia in patients undergoing VATS lobectomy showed a promising analgesic effect and improved perioperative depression and postoperative recovery quality, with no severe AEs observed.