2.5. Induction and Maintenance
ANI
In the S group, patients were induced with an effect-site concentration (Ce) of 2.0 ng.mLAnesthesia was maintained with an oxygen flow of 0.3 L.minThe intraoperative administration of propofol and remifentanil was guided by maintaining the BIS value at 40–60 and a keeping 4 min moving average ANI of 50–70 during surgery. For the S group, the Ce of remifentanil was kept at 2.0 ng.mLFor the M group, the Ce of the RP mixture regimen was decreased to 2.5 mcg.mL