“…The values of reflux index, time of content remaining in the esophagus, including acid content, and time of esophageal clearance of acidic content were statistically higher in children with diagnosed gastroesophageal reflux disease than in children without this disease. Our results were similar to those from other studies [16,20,21]. Di Pace et al [21], using MII/pH, demonstrated that in children who underwent a corrective operation for EA/TEF, gastroesophageal reflux disease was frequent and that the time of bolus clearance, acid clearance and time of bolus passage were pathological.…”