The preoperative levels of tumor necrosis factor-a ( TNF - a ) and interleukin-6 OL-6 ) were both less than 1.0 ng/L , and the postoperative levels of TNF-a showed no significant change , and IL-6 was increased to 485.10 ( 104.00-837 .50 ) ng/L and 193.26 ( 95.10-385 .20 ) ng/L in control and Xuebijing groups respectively ( P < 0.01 ) .