Abstract:Objective To investigate the effects of epidural anesthesia combined with multimodal analgesia on immune function and high mobility group protein B1 (HMGB1) after laparoscopic gynecological surgery under general anesthesia.Methods A total of 112 patients who were admitted to our hospital from January 2018 to January 2022 and underwent laparoscopic gynecological surgery under general anesthesia were selected and divided into control group and study group, with 56 cases in each group. The study group was given epidural anesthesia combined with multimodal analgesia on the basis of general anesthesia, while the control group was given general anesthesia combined with multimodal analgesia. The intraoperative changes of hemodynamic indexes of the two groups were recorded. Postoperative pain was compared between the two groups. Perioperative HMGB1, stress response and immune function were also compared between the two groups. The incidence of anesthetic adverse drug reactions in the two groups during the perioperative period was analyzed.Results Comparison of heart rate and mean arterial pressure (MAP) between the study group and the control group before anesthesia induction (T0), 5 min after establishment of pneumoperitoneum (T1) and 5 min after deflation of pneumoperitoneum (T2) showed differences in heart rate and MAP at different time points (P < 0.05). The heart rate and MAP of the study group were lower than those of the control group, indicating more stable hemodynamics (P < 0.05). There were differences in the change trends of heart rate and MAP between the study group and the control group (P < 0.05). Comparison of HMGB1 between the study group and the control group before, and 24 h and 48 h after the surgery showed differences in HMGB1 at different time points (P < 0.05). Compared with the control group, HMGB1 in the study group was lower (P < 0.05), which suggested milder inflammatory response. Besides, the change trend of HMGB1 was different between the study group and the control group (P < 0.05). Comparison of adrenalin (Adr) and cortisol (Cor) between the study group and the control group before, and 24 h and 48 h after the surgery showed differences in Adr and Cor at different time points (P < 0.05), and also between the study group and the control group (P < 0.05). Specifically, the levels of Adr and Cor were lower in the study group, reflecting milder stress response. The change trends of Adr and Cor were different between the study group and the control group (P < 0.05). Comparison of CD4+/CD8+ between the study group and the control group before, and 24 h and 48 h after the surgery showed differences in CD4+/CD8+ at different time points (P < 0.05). Compared with the control group, CD4+/CD8+ was higher in the study group (P < 0.05), demonstrating milder immune suppression. The change trend of CD4+/CD8+ was different between the study group and the control group (P < 0.05). There was no significant difference in the overall incidence of adverse reactions between the two groups (P > 0.05).Conclusions Epidural anesthesia combined with multimodal analgesia in laparoscopic gynecological surgery under general anesthesia can stabilize intraoperative hemodynamic indexes, reduce postoperative pain, inhibit the secretion of inflammatory factor HMGB1, and relieve immune suppression and stress response with few safety concerns.