Abstract
To investigate the effects of sustained inhalation of sevoflurane on cognitive function and the expression of oxidative stress response proteins such as NADPH oxidase subunits NOX2 and NOX4 in elderly patients undergoing radical surgery for lung cancer. An experimental study. Department of Anesthesiology, Suzhou Kowloon Hospital, Shanghai Jiao Tong University School of Medicine, China, from February 2016 to October 2017. Elderly patients who underwent radical surgery for lung cancer were divided into the sevoflurane group and the propofol group, with 52 cases in each group. Sustained inhalation of sevoflurane and propofol was administered to maintain anesthesia in the respective groups. Cognitive function and lung function parameters were compared between the two groups. Serum S100 β levels and expression of NOX2 and NOX4 proteins in peripheral blood mononuclear cells of the two groups were determined. At 24 hours after surgery, the lung function indices of the sevoflurane group such as FEV1, FVC and VC were higher than those of the propofol group (p<0.001, p=0.008 and p=0.002, respectively). At the end of the surgery and at 24 hours after surgery, the MMSE scores of the sevoflurane group were higher than the propofol group (all p<0.001). S100 levels were lower than the propofol group (p=0.003 and p<0.001, respectively). Levels of NADPH oxidase subunits NOX2 and NOX4 proteins in peripheral blood mononuclear cells of the sevoflurane group were lower than the propofol group (p=0.033, p<0.001, p<0.001and p<0.001, respectively). Compared with intravenous anesthesia with propofol, general anesthesia with sevoflurane inhalation has little effect on the short-term cognitive function in elderly patients undergoing radical surgery for lung cancer, and can effectively improve lung function. The mechanism may be related to the reduction of the expression of NOX2 and NOX4 proteins.
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