Eighty patients with end stage renal failure undergoing living donor kidney transplant under general anesthesia were included in this study, by using an open (non-blinded) study design, patients were randomly assigned to two groups, 15 patients in each. Randomization was done through computer generated random tables. Isoflurane group; anesthesia was maintained with isoflurane 1-2%. Sevoflurane group; anesthesia was maintained with Sevoflurane 1-2%.