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Updated: Jun 25, 2026
06:46
Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Placement of pH probes during upper endoscopy: direct visualization is accurate
Troy E Gibbons1, Julissa Corredor-Buchmann, Chandra D Smith
1Department of Pediatrics, UAMS and Arkansas Children's Hospital, USA.
The Journal of the Arkansas Medical Society
|March 3, 2009
Summary
Directly visualizing the gastroesophageal junction for esophageal pH monitoring catheter placement in children is more accurate than using a formula. This method reduces radiation exposure by eliminating the need for confirmatory radiographs.
Area of Science:
- Pediatric Gastroenterology
- Medical Device Placement
- Diagnostic Imaging
Background:
- Accurate esophageal pH monitoring in children typically involves endoscopy, a mathematical formula, and a confirmatory radiograph.
- Current methods for catheter placement rely on indirect measurements and imaging.
Purpose of the Study:
- To evaluate the efficacy of direct endoscopic visualization of the gastroesophageal junction for pH monitoring sensor placement in pediatric patients.
- To determine if direct visualization can replace the need for confirmatory radiography.
Main Methods:
- A comparative study involving 64 catheter placements using the Strobel formula and 57 placements using direct visualization.
- Placement accuracy was assessed by the need for probe adjustment.
Main Results:
- Catheter placement via direct visualization required adjustment in only 7% of cases, significantly lower than the 66% adjustment rate with the formula method (p < .005).
- Direct visualization proved to be a highly accurate method for sensor placement.
Conclusions:
- Direct visualization of the gastroesophageal junction is an accurate and effective method for placing esophageal pH monitoring sensors in children.
- This technique minimizes radiation exposure by obviating the need for confirmatory radiographs, improving patient safety.
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