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Gastroesophageal reflux in children: evaluation of the water siphon test
Insights
The water siphon test effectively identifies gastroesophageal reflux in children, though it has a high false-positive rate. It is recommended as an initial diagnostic tool for symptomatic pediatric patients.
Area of Science:
- Pediatric Gastroenterology
- Diagnostic Imaging
Background:
- Gastroesophageal reflux (GER) is a common condition in symptomatic children.
- Accurate diagnosis of GER is crucial for effective management.
- Various diagnostic tests exist, each with limitations.
Purpose of the Study:
- To evaluate the efficacy of the water siphon test compared to acid reflux testing and esophageal manometry in diagnosing GER in children.
- To determine the diagnostic accuracy and identify potential limitations of the water siphon test.
Main Methods:
- Fifty-nine symptomatic children underwent radiological evaluation for GER.
- Tests included the water siphon test, acid reflux test, and esophageal manometry.
- Correlation between lower esophageal sphincter pressure and test results was analyzed.
Main Results:
- 95% of children with confirmed reflux on pH testing had positive water siphon tests.
- 29% of children with negative acid reflux tests showed positive water siphon tests, indicating a high false-positive rate.
- Lower esophageal sphincter pressure correlated with test results only when below 10 mm Hg.
Conclusions:
- Barium esophagography with the water siphon test is a suitable initial examination for symptomatic children with suspected GER.
- The high false-positive rate of the water siphon test necessitates careful interpretation and consideration of other diagnostic methods.
Abstract:
Fifty-nine symptomatic children were radiologically evaluated for gastroesophageal reflux with the water siphon test and also with the acid reflux test and esophageal manometry. Of those with reflux on pH testing, 95% had positive water siphon tests, and 38% also had spontaneous barium reflux. Of those with negative acid reflux tests, 29% had positive water siphon tests. Lower esophageal sphincter pressure did not correlate with either test unless the pressure was less than 10 mm Hg. Barium esophagography with the water siphon test is the appropriate initial examination in symptomatic patients, but the false-positive rate is high.