Effect of the Combination of Dexamethasone and BIS Monitoring on Reducing Postoperative Nausea and Vomiting in Children

Immediately after securing the airway, an electrode will be attached and BIS monitoring will begin. This will be used to control the depth of general anaesthesia throughout the entire surgical procedure, with the aim of achieving BIS values of 40-60.

Intervention group: Following the administration of dexamethasone at the same dos-age as in the control group, BIS monitoring will be initiated immediately, with the depth of general anaesthesia controlled to a BIS value of 40-60.

Control group: Once access to the vascular system has been secured, dexamethasone will be administered intravenously at a dose of 0.15 mg/kg body weight, up to a maxi-mum of 5 mg. A non-functional electrode for bispectral index (BIS) monitoring will then be attached to the patient's forehead. The depth of anaesthesia will be controlled based on the minimum alveolar concentration (target MAC: 1-1.1).

Inclusion criteria

• children aged 2 to 8 years undergoing endoscopic adenoidectomy
• parental/child consent
• ASA I-II (American Society of Anaesthesiologists Physical Status)
• no central nervous system (CNS) or gastrointestinal tract (GIT) disease
• no corticosteroid medication

Exclusion criteria

• Parent/child disapproval
• ASA III and above (American Society of Anaesthesiologists Physical Status)
• central nervous system (CNS) or gastrointestinal tract (GIT) disease
• chronic corticosteroid therapy