Nebulized Dexmedetomidine for Post-Anesthesia Delirium in Preschool Children

participant will : Nebulized with the anesthetic drug dexmedetomidine at a dose of 2 mcg/kg body weight, diluted to 3 ml with 0.9% normal saline, is administered before the induction of anesthesia in the reception area. After the anesthesia, primary data collection is conducted by recovery room staff who are blinded to the treatment and control groups. Data includes scores or levels of post-anesthesia delirium or agitation assessed using the pediatric anesthesia emergence delirium score (PAED score) in the recovery room.