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Updated: Aug 6, 2026

Simultaneous Laryngopharyngeal and Conventional Esophageal pH Monitoring
Published on: December 14, 2020
Children with gastroesophageal reflux with or without partial thoracic stomach (hiatal hernia) have normal gastric
P T Jackson1, J F Glasgow, P S Thomas
1Department of Child Health, Queen's University of Belfast Institute of Clinical Science, Northern Ireland.
Insights
Gastric emptying rates did not differ between children with gastroesophageal reflux, hiatal hernia, or non-specific vomiting. This study did not explain projectile vomiting in these pediatric reflux conditions.
Area of Science:
- Pediatric Gastroenterology
- Digestive Physiology
Background:
- Gastroesophageal reflux and hiatal hernia are common in children.
- Projectile vomiting is a frequent symptom, but its cause is not fully understood.
Purpose of the Study:
- To investigate gastric emptying in children with gastroesophageal reflux and hiatal hernia.
- To determine if altered gastric emptying explains projectile vomiting in these conditions.
Main Methods:
- Gastric emptying was measured using a modified double-sampling dye dilution technique.
- Three groups were studied: reflux with hiatal hernia, reflux alone, and controls with non-specific vomiting.
Main Results:
- No significant differences in gastric emptying rates were found between the groups.
- The study did not identify altered gastric emptying as the cause of projectile vomiting.
Conclusions:
- Altered gastric emptying does not appear to explain projectile vomiting in pediatric gastroesophageal reflux or hiatal hernia.
- Further research is needed to understand the pathophysiology of projectile vomiting in these pediatric disorders.
Abstract:
Gastric emptying was measured using a modification of the double-sampling dye dilution technique in 16 children with gastroesophageal reflux and partial thoracic stomach (hiatal hernia), 13 with reflux per se, and 12 controls with nonspecific vomiting. No differences could be demonstrated between the rate of emptying in these groups. Our study failed to provide a rational explanation for the copious projectile vomiting that is a frequent manifestation of these disorders.
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