Abstract:【Objective】To investigate the protective effect of lidocaine in patients with one-lung ventilation and its influence on the levels of interleukin-1β,interleukin-6 and interleukin-8.【Methods】Our hospital recruited 80 patients undergoing lobectomy under general anesthesia from October 2018 to October 2020,and randomly divided them into observation group(n=41)and control group(n=39).The observation group was given an intravenous injection of lidocaine 1.5 mg/kg immediately after induction of anesthesia,and the control group was given an intravenous injection of the same amount of normal saline.Both groups were given a pump administration at a rate of 1.5 mg/(kg·h)until the end of the operation.The antioxidant index levels(superoxide dismutase,glutathione,malondialdehyde)and interleukin-1β,interleukin-6,and interleukin-8 levels between the two groups were compared before anesthesia induction(T1),OLV 45 min(T2),OLV 90 min(T3),postoperative 2 h(T4).【Results】Compared with T1,the total superoxide dismutase and glutathione peroxidase levels of the two groups decreased at T2 and T3,and the observation group was higher than the control group,the difference was statistically significant(P<0.05).The comparison of total superoxide dismutase and glutathione peroxidase between the two groups at T1 and T4 time points was not statistically significant(P>0.05);compared with T1,the comparison of the levels of malondialdehyde within the two groups at T2 and T4 time points was not statistically significant(P>0.05);the level of malondialdehyde at T3 in the control group was higher than that at T1,and the level of malondialdehyde at T3 in the observation group was lower than that at T1(P<0.05).The MDA level of the two groups at T1,T2,and T4 was not statistically significantly different(P>0.05),while the MDA level of the observation group at T3 was lower than that of the control group(P<0.05).The differences in the levels of interleukin-1β,interleukin-6,and interleukin-8 at T1 time point between the two groups were not statistically significant(P>0.05).Compared with T1,the levels of interleukin-1β,interleukin-6 and interleukin-8 at T2~T4 in the control group increased significantly(P<0.05).There were no statistically significant differences in the levels of interleukin-1β,interleukin-6 and interleukin-8 within the observation group at each time point(P>0.05).The levels of interleukin-1β,interleukin-6 and interleukin-8 at T2~T4 in the observation group were significantly lower than those in the control group,and the difference was statistically significant(P<0.05).【Conclusion】Lidocaine has a certain lung protective effect in patients with one-lung ventilation,and can reduce the levels of pro-inflammatory factors interleukin-1β,interleukin-6,and interleukin-8 during one-lung ventilation.