In each group , the biological indices were monitored during surgery at 11 time points named T. ( before anesthesia I induction ) , T1 ( intubation in general anesthesia induction ) , T2 ( skin incision ) , T3 ( rib exposure in muscular incision ) T. ( chest open ) , T , ( lung removal ) , T6 ( drainage tube implantation ) , T7 ( chest closure ) , T ( muscular stitching ) , T , ( skin stitching ) and T0 ( extubation ) .