Abstract: Objective:To investigate the influencing factors for 6h extubation after mitral valvulooplasty under complete thoracoscopy.Methods:The clinical data of 107 patients undergoing thoracoscopic mitral valvuloplasty (MVP) in our hospital were retrospectively analyzed. The subjects were divided into two groups according to time of extubation: those with extubation at 6 h after operation as the normal group ( n=70) , and those beyond 6 h as the delay group ( n=37) . The clinical data of patients before, during and after surgery were compared between groups. Binary logistic regression analysis was used to identify the potential influencing factors of fast-track anesthesia. Results:There were significant differences between groups in coronary bypass (CPB) time, aortic cross clamp (ACC) time, preoperative pulmonary arterial pressure >60 mmHg, persistent atrial fibrillation, cormobidity with coronary heart disease, intraoperatively pumped dexmedetomidine (DEX) , and serum procalcitonin (PCT) level on the first postoperative day ( P<0.05) . Logistic regression showed that the risk factors for delayed extubation included preoperative cormobidity with coronary heart disease [ OR=4.020, 95% CI (1.341, 16.607) , P=0.023], prolonged CPB time [ OR=0.950, 95% CI (0.911, 0.990) , P=0.015], and postoperative PCT elevation [ OR=0.799, 95% CI (0.701, 0.912) , P=0.001]. The protective factor against delayed extubation wasintraoperative pumped DEX [ OR=0.309, 95% CI (0.090, 1.063) , P=0.042]. Conclusion:Cormobidity with coronary heart disease, prolonged CPB time, and elevated PCT after surgery are risk factors that influence 6 h extubation after thoracoscopic MVP. Intraoperative DEX pumping is a protective factor against delayed extubation.