The aim of our study was to evaluate the changes of IOP during laparoscopic surgery in pediatric patients.We enrolled thirty-six patients, ranging in-between 15 months-16 years, undergoing elective abdominal surgery. Eighteen received laparoscopic surgery (LS) and eighteenlaparotomy surgery (LT). In the LS group, IOP was measured before and after induction, during mechanical ventilation, after established pneumoperitoneum, in the Trendelenburg position after 5, 10 and 30 min (T5, T10, T30), and

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... at extubation time. In the LT group IOP was measured before and after induction, during surgical incision, after 5, 10, 30 min and at extubation time in supine position.Compared to LT group, where IOP (baseline: 10.9±1.7 mmHg) was unchanged during the whole procedure, in the LS group(baseline: 10.8±2.4 mmHg),IOP increased significantlyafter established pneumoperitoneum and during Trendelenburg positioning (maximal mean value at T5: 14.6±2.1 mmHg).In pediatric patients that receive laparoscopic surgery, IOP increases by some mmHg.