Patients will undergo anesthesia induction as routine after premedication. Once the target BIS level is reached (40-60) and muscle relaxation is achieved, the airway will be secured with an appropriately sized endotracheal tube or laryngeal mask (LMA).

The effect zone target concentration of propofol will be adjusted to 3 mcg/ml with the HKI device.

Patients will receive controlled ventilation with 50% oxygen/air, and mechanical ventilation parameters will be adjusted so that the end tidal carbon dioxide level (EtCO2) is 35-45 mmHg.

Patients will undergo anesthesia induction as routine after premedication. The level of sevoflurane, an inhalation gas, will be adjusted so that BIS values are between 40-60. Patients will receive controlled ventilation with 50% oxygen/air, and mechanical ventilation parameters will be adjusted so that the end tidal carbon dioxide level (EtCO2) is 35-45 mmHg.

TCI (Target Controlled Infusion) is a method used to maintain the dose and rate of anesthesia drugs within a target concentration range set by the anesthetist. This system delivers drugs intravenously to the patient using a computer-controlled pump. The anesthetist adjusts the drug concentration to achieve the desired depth of anesthesia. This method provides more precise control over anesthesia and facilitates maintaining the depth of anesthesia within the desired range.

The effects on recovery were monitored within the first hour of the postoperative period using the Modified Aldrete Scoring System (MASS). Totally 0-10 points can be given by MASS. Higher scores predicts better recovery.

The blood pressure of the patients will be measured and recorded in mmHg at five-minute intervals from the beginning until the first postoperative hour.