Figure 4. Maximum urinary NAG excretion after anesthesia. (Top) With all patients included (34 patients), maximum urinary NAG excretion after anesthesia in the sevofluranehighgroup significantly differed from the isoflurane group (P < 0.05). (Bottom) With patients limited to those who were administered cephalosporins and underwent tourniquet inflation (25 patients), a significant difference was also found in maximum urinary NAG excretion after anesthesia between the sevofluranehighand the isoflurane group (P < 0.05).