Abstract:Objective To investigate the influence of three different anesthesia on level of CD4+CD25+Foxp3+ Treg cells and prognosis of patients with rectal cancer undergoing CO2 pneumoperitoneum laparoscopic surgery. Methods A prospective cohort study was carried out in 143 adult patients, who received colorectal cancer surgery under CO2 pneumoperitoneum laparoscope in our hospital between January 2011 and December 2012. The hemodynamic changes in the patients with general anesthesia (GA), combined epidural and general anesthesia (EA), and EA combined with 6% hydroxyethyl starch solution acute hemodilution (EA+AHH) during surgery, the level of CD4+CD25+Foxp3+ Treg cells before operation and 1 month after operation and the survival rate of 3-year follow-up were compared between the three groups. Results Compared with the other two groups, the intraoperative blood pressure fluctuation was smaller, the decreased range of CD4+CD25+Foxp3+/CD4+ T cell ratio in peripheral blood 1 month after surgery was greater, and the 3-year survival rate was significantly higher in the (EA+AHH) group (P < 0.05). There was no statistically significant difference between the GA and EA groups (P > 0.05). Conclusions Acute hypervolemic hemodilution using 6% hydroxyethyl starch combined with epidural anesthesia can significantly improve the immune status and prognosis of the patients with rectal cancer undergoing CO2 pneumoperitoneum laparoscopic surgery.