Background: Accurate catheter placement in children for esophageal pH monitoring is performed following an endoscopy using a mathematical formula followed by confirmatory radiograph.
Aim: To determine if endoscopic visualization of the gastroesophageal junction can be used for sensor placement without the need for confirmatory radiograph.
Methods: Sixty-four catheters were placed using the Strobel formula method and 57 catheters were placed by visualization.
Results: With the formula method, 66% of children required probe adjustment compared with 7% when the probe was placed by direct visualization (p < .005).
Conclusion: Placing pH sensors under direct visualization is accurate and reduces radiation exposure.