Timing of Aminophylline and Recovery in Pediatric Ambulatory Surgery

Inclusion Criteria: * Age from 4 to 12 years. * Both sexes. * American society of Anesthesiologist (ASA) physical status I-II. * Scheduled for pediatric ambulatory elective surgical procedures lasting ≤ three hours duration. Exclusion Criteria: * Parents refusal to participate. * Conditions and diseases interfering with ambulatory day case surgery e.g., significant respiratory diseases, morbid obesity, obstructive sleep apnea, sickle cell anemia, prematurity, D.M, and family history of malignant hyperthermia. * Laparoscopic, endoscopic or abdominal surgeries. * History of cardiac arrhythmia or palpitation. * Patients with congenital heart, significant cardiovascular, respiratory diseases, renal impairment, hepatic dysfunction, hypo/hyperthyroidism or active peptic ulcer disease. * Patients with neurological, psychiatric diseases, cognitive dysfunction, epilepsy or history of convulsions. * Current treatment with xanthines or patient received aminophylline in the previous 24 hr. Hypersensitivity to aminophylline or other methylxanthines. * Patients who need alteration in the sevoflurane concentration due to either hypo/hypertension were excluded from the study and replaced.