Blood cytokine levels rise even after minor surgical trauma.

The exact changes in cytokine production and clinical implications of the increased cytokine levels following operative trauma remain unclear. In this study, systemic production of a spectrum of cytokines, including IL1 alpha, IL1 beta, IL6, IL8, IL10, and IFN gamma, was examined in patients undergoing minor elective operative trauma. The levels of IL1 receptor antagonist (ra) and IL6 soluble receptor (sR) were also determined. Although there were no changes in IL1 alpha and IL1 beta plasma levels during the entire observation period, there was a significant rise in IL1 ra level in all patients between postoperative day 1 and postoperative day 14. A significant increase in the IL6 plasma level was seen on days 1, 3, and 7 after surgery and an increase in the IL6 sR level was observed on postoperative days 10 and 14. Interestingly, the IL8 plasma values had risen significantly on days 1 and 3 following the operation. In some patients, an elevation in IL10 plasma level was noted on days 1 and 3 postsurgery. Results demonstrated that even a minor surgical procedure such as cholecystectomy with uneventful wound healing was followed by an appearance in the blood circulation of significant levels of cytokines between day 1 and day 14 after surgery. These observations point to the necessity of searching for methods of down-regulating the systemic cytokine effects after surgical trauma for the routine postoperative management.