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