Objective: To observe the effect of different doses of esketamine on early mood in patients with preoperative anxiety after thoracoscopic surgery. Methods: Eighty patients with preoperative anxiety before thoracoscopic surgery, 37 males and 43 females, aged 25-64 years, BMI 18-26 kg/m2, ASA physical status Ⅰ-Ⅲ were selected. According to random number table, the patients were randomly divided into four groups: control group (group C), esketamine 0.1 mg/kg group (group E1), esketamine 0.2 mg/kg group (group E2), and esketamine 0.3 mg/kg group (group E3), 20 patients in each group. In groups E1, E2, and E3, the patients were slowly injected with corresponding doses of esketamine intravenously 30 minutes before the end of the operation, and the patients in group C were given 10 ml of normal saline at the same time. The 7-item generalized anxiety disorder scale (GAD-7) score and hospital anxiety and depression scale (HADS) score were evaluated 24 hours before surgery, 24, 48, 72, and 120 hours after surgery, respectively. Peripheral venous blood (5 ml) was collected at the same time points, and serum brain-derived neurotrophic factor (BDNF) concentration was detected by ELISA. NRS scores at rest and exercise were recorded 12 and 24 hours after surgery. The number of remedial analgesia and the number of effective compressions of analgesia pump within 48 hours after surgery were recorded. Results: Compared with group C, the scores of GAD-7 and HADS in groups E1, E2, and E3 were significantly decreased 24, 48, and 72 hours after surgery (P < 0.05). And compared with groups E1 and E2, the scores of GAD-7 and HADS in group E3 were significantly lower (P < 0.05). The serum BDNF level in groups E1, E2, and E3 were significantly increased compared with group C 24, 48, and 72 hours after surgery (P < 0.05). Compared with group E1 and E2, the serum BDNF level in group E3 was significantly higher (P < 0.05). Compared with group C, the NRS scores at rest 12 and 24 hours and the scores at exercise 12 hours after surgery in groups E1, E2, and E3 were significantly decreased (P < 0.05). And compared with groups E1 and E2, the scores in group E3 were significantly lower (P < 0.05). The number of postoperative remedial analgesia and the number of effective compressions of analgesia pump in groups E1, E2, and E3 were significantly decreased compared with group C within 48 hours after surgery (P < 0.05). And compared with groups E1 and E2, the number in group E3 was significantly lower (P < 0.05). Conclusion: Single intravenous injection of esketamine 0.1, 0.2, and 0.3 mg/kg can improve early postoperative mood of patients with anxiety before thoracoscopic surgery, and esketamine 0.3 mg/kg has better anti-anxiety effect. |