The patients were allocated randomly to receive propofol or sevoflurane. Also, a total of 18ml of blood sample was obtained for total 3 times in consecutive order.
1. immediate before anesthesia induction
2. postoperative 1 hours
3. postoperative 24 hours
Serum in blood will be obtained and activity of helper T cell, natural killer cell and level of serum cytokine will be evaluated by flow cytometry or enzyme-linked immunosorbent assay
