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Hydrogen breath test in small intestinal malabsorption
Insights
The hydrogen breath test aids in diagnosing pediatric malabsorption, correlating with celiac disease severity and identifying Giardia in non-celiac cases. It also helps distinguish contaminated small intestine syndrome from absorptive surface reduction.
Area of Science:
- Pediatric Gastroenterology
- Digestive Health
- Diagnostic Testing
Background:
- Malabsorption in children presents diagnostic challenges.
- Celiac disease and other conditions affect nutrient absorption.
- Accurate diagnosis is crucial for appropriate management.
Purpose of the Study:
- To evaluate the utility of the hydrogen breath test (HBT) in pediatric malabsorption.
- To correlate HBT findings with celiac disease severity and villous atrophy.
- To identify causes of positive HBT in non-celiac children.
Main Methods:
- Jejunal biopsy and HBT performed on 57 children.
- Participants included 34 with celiac disease and 23 with other malabsorption causes.
- Analysis of HBT results in relation to villous damage and age.
Main Results:
- Positive HBT findings increased with villous damage in celiac disease.
- Age dependence observed in subtotal villous atrophy, with more positive HBT in children under three.
- Giardia lamblia infestation was the most common cause of positive HBT in the non-celiac group.
- Lactose malabsorption confirmed by HBT in 27 cases, with only 11 experiencing diarrhea.
- HBT differentiated contaminated small intestine syndrome from malabsorption due to reduced absorptive surface.
Conclusions:
- The hydrogen breath test is a valuable tool in diagnosing pediatric malabsorption.
- HBT results correlate with the extent of villous atrophy in celiac disease.
- HBT aids in identifying infectious causes like Giardia and distinguishing between different malabsorption etiologies.
Abstract:
Jejunal biopsy and hydrogen breath test were performed in 57 children, 34 having coeliac disease and 23 with other forms of malabsorption. In children affected by coeliac disease there was a gradually increasing incidence of positive findings with the H2 breath test as villous damage progressed. In the group of subtotal villous atrophy age dependence was also observed, the majority of positive results occurring below three years of age. In the non-coeliac group the most frequent cause of the positive finding was Giardia lamblia infestation. Among 27 cases with lactose malabsorption confirmed by a positive hydrogen breath test only 11 had diarrhoea. The test proved to be useful in differentiating between the contaminated intestine syndrome and malabsorption due to reduced absorptive surface.