Effects of General Anesthesia Versus Spinal Anesthesia on Serum Cytokine Release after Cesarean Section: A Randomized Clinical Trial

 Tissue damage caused by major surgery, such as cesarean section, may lead to a poor host immune response and excessive release of cytokines. These responses may increase the risk of infection, cause postoperative pain, and exert damaging effects on various body organs.

 Anesthesia methods may affect cytokine production after surgery. This study aimed to compare the serum levels of cytokines in general and spinal anesthesia among women undergoing cesarean section.

 Thirty parturients (ASA class I and II) undergoing cesarean section were randomly assigned into two equal groups of spinal anesthesia and general anesthesia. Blood samples were taken for measuring the levels of interleukin-6 (IL-6), interleukin-10 (IL-10), and tumor necrosis factor-alpha (TNF-α) before induction of anesthesia and 30 minutes after entering the recovery room.

 In the general anesthesia group, the postoperative serum levels of IL-6 and TNF-α were significantly higher than the corresponding preoperative levels. Significant differences were found between the two groups in the preoperative and postoperative levels of TNF-α. Changes in the IL-6 and TNF-α concentrations were significantly higher in the general anesthesia group as compared to the spinal anesthesia group. However, there was no significant difference in the IL-6:IL-10 and TNF-α: IL-10 ratios between the two groups.

 General anesthesia, as compared to spinal anesthesia, significantly increased the IL-6 and TNF-α levels after cesarean section. Therefore, the spinal anesthesia technique may be a better option for patients undergoing cesarean section.