Abstract
This study aimed to investigate the effects of esketamine (Esk) combined with dexmedetomidine (Dex) on postoperative delirium (POD) and quality of recovery (QoR) in elderly patients undergoing thoracoscopic radical lung cancer surgery. In this prospective, randomized, and controlled study, 172 elderly patients undergoing thoracoscopic radical lung cancer surgery were divided into two groups: the Esk+Dex group (n=86) and the Dex group a (n=86). The primary outcome was the incidence of POD within 7days after surgery and the overall Quality of Recovery-15 (QoR-15) scores within 3days after surgery. Secondary outcomes included postoperative adverse reactions, extubation time, PACU stay, and hospitalization time. Serum levels of IL-6, IL-10, S100β protein, NSE, CD3+, CD4+, and CD8+ were detected from T0 to T5. Compared with the Dex group, the incidence of POD in the Esk+Dex group was significantly lower at 7days after surgery (14.6% vs 30.9%; P=0.013). The QoR-15 score was significantly increased 3days after surgery (P<0.01). Levels of IL-6 and CD8+ were significantly decreased, and IL-10 levels were significantly increased at T1-T2 (P<0.05). At T1-T4, NSE levels were significantly decreased, while CD3+ and CD4+/CD8+ values were significantly increased (P<0.01). At T1-T5, serum S100β protein concentration decreased significantly, and CD4+ value increased significantly (P<0.01). The incidence of nausea/vomiting and hyperalgesia decreased significantly 48hours after surgery (P<0.01). The duration of extubation, PACU stay, and postoperative hospitalization were significantly shortened. Esketamine combined with dexmedetomidine can significantly reduce the POD incidence and improve the QoR in patients undergoing thoracoscopic radical lung cancer surgery, which may be related to the improvement of cellular immune function.
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