2.3. General anesthesia management:
The same general anesthesia induction and maintenance protocol was applied to all patients. Standard monitoring including pulse oximetry, electrocardiogram and non-invasive blood pressure arterial was applied when the patients were taken into the operation room.
After providing intravenous (i.v.) access, intravenous (i.v.) midazolam 0.03 mg kg-1 was administered for premedication.
Oxygen was given at 4 lt / min with Facemask. The patients were intubated after induction with propofol 2-3 mg kg-1, fentanyl 1.5 µg kg-1 and rocuronium bromide 0.6 mg kg-1. ACB was applied to the patients in the experimental groups before anesthesia induction. Maintenance of anesthesia was provided with 0.6-1 MAC sevoflurane and 0.08-0.2 mcg / kg / min remifentanil infusion. The dose of inhalation agent and remifentanil was adjusted according to the hemodynamic response of the patient.