Emergence Agitation

The included patients in the study will not be premedicated by sedatives, they will be preoxygenated for 5 minutes by 100% oxygen. The induction of anesthesia will be by fentanyl 100 microgram, 1.5 mg/kg lidocaine followed by propofol 2mg/kg, and rocuronium 0.5 mg/kg. oral intubation will be commenced and an oral pack will be inserted. Anesthesia will be maintained by sevoflurane 2% and N2O : O2 ratio of 50: 50. Hypotensive anesthesia will be conducted by labetalol 10- 20 mg i.v. At the end of surgery inhalational anesthesia will be abandoned and muscle relaxant will be antagonized either by sugamadex 1mg/kg or neostigmine 0.05 mg/kg mixed with atropine 0.02 mg/kg. After awakening of the of the patients, emergence agitation will be assessed by Agitation and Emergence Score (AES): This scale is ranging from 0 (calm and cooperative) to 4 (combative, aggressive behavior).