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Oral fat loading test: a reliable procedure for the study of fat malabsorption in children
Insights
The oral triglyceride loading test effectively distinguishes children with gastrointestinal disease from healthy children. This fat malabsorption test correlates with fat absorption but shows discrepancies in mucosal pathology cases.
Area of Science:
- Pediatric Gastroenterology
- Clinical Nutrition
- Diagnostic Testing
Background:
- Gastrointestinal disorders in children present diagnostic challenges.
- Accurate assessment of fat absorption is crucial for managing pediatric digestive diseases.
- Existing diagnostic methods may require invasive procedures or complex analysis.
Purpose of the Study:
- To evaluate the utility of an oral triglyceride (TG) loading test in diagnosing gastrointestinal disorders in children.
- To assess the correlation between plasma TG levels and the coefficient of fat absorption (CFA).
- To differentiate between functional gastrointestinal disturbances and organic diseases.
Main Methods:
- Four groups of children were studied: normal controls, chronic nonspecific diarrhoea (CND), biopsy-proved mucosal pathology (MP), and intraluminal fat malabsorption (IFM).
- Oral triglyceride loading tests were administered.
- Plasma triglyceride (TG) levels were measured post-meal.
- Coefficient of fat absorption (CFA) was determined for comparison.
Main Results:
- A plasma TG rise of ≥55 mg/100 ml effectively discriminated between children with gastrointestinal disease and those with functional issues or normal controls.
- The postmeal plasma TG rise correlated well with CFA in normal subjects, CND, and IFM groups.
- Children with MP exhibited a disproportionately low plasma TG rise relative to their CFA.
Conclusions:
- The oral triglyceride loading test is a valuable, non-invasive tool for the diagnosis and clinical evaluation of pediatric gastrointestinal disorders.
- The test aids in distinguishing between various pediatric gastrointestinal conditions based on fat absorption patterns.
- Discrepancies in TG response within the MP group highlight specific diagnostic considerations for mucosal pathology.
Abstract:
Oral triglyceride (TG) loading tests were performed in four groups of children: normal controls, patients with chronic nonspecific diarrhoea (CND), biopsy-proved mucosal pathology (MP), and disturbed intraluminal fat malabsorption (IFM). The rise of plasma TG levels greater than or equal to 55 mg/100 ml (greater than or equal to 0.6 mmol/l) can discriminate between patients with gastrointestinal disease and normal controls or patients with functional disturbances. The postmeal plasma TG rise correlates well with the coefficient of fat absorption (CFA) in normal subjects, patients with CND, and patients with IFM, but not in patients with MP who showed a disproportionally low plasma TG rise compared with their CFA. This test can serve as a useful tool in diagnosis and clinical evaluation for children with gastrointestinal disorders.