TITLE

Mixing of the intestinal content and variations of fermentation capacity do not affect the results of hydrogen breath test

AUTHOR(S)
Di Stefano, Michele; Miceli, Emanuela; Malservisi, Simona; Missanelli, Antonio; Strocchi, Alessandra; Corazza, Gino Roberto
PUB. DATE
July 2003
SOURCE
American Journal of Gastroenterology;Jul2003, Vol. 98 Issue 7, p1584
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
: ObjectivesAlthough the hydrogen (H2) breath test has been in use for many years for diagnosis of sugar malabsorption, research is still underway to improve its diagnostic accuracy. In this study, we investigated whether possible confusing factors caused by the ingestion of the test solution itself (such as the delivery to the colon of other fermentable substrates pre-existing in the small bowel lumen, the release of preformed H2 trapped in the feces, or differences in the fermenting capacity of the colonic bacteria) may interfere with the increase of breath H2 concentration, an expression of malabsorption of the test substrate.: MethodsIn 25 patients with untreated celiac disease and 23 sex- and age-matched healthy volunteers, breath H2 excretion was measured after ingestion of a 250-ml solution containing sorbitol, a poorly absorbed alcohol sugar. On 2 other separate days, 12 randomly selected subjects in each group underwent breath H2 excretion measurement after ingestion of 250 ml of a sugar free, nonabsorbable electrolyte solution and 250 ml of a solution containing lactulose, a nonabsorbable disaccharide.: ResultsAfter sorbitol ingestion, celiac disease patients showed a significantly higher breath H2 excretion than did healthy volunteers. Otherwise, breath H2 responses to electrolyte solution and lactulose showed no difference between the two groups of subjects.: ConclusionsIn a group of patients with sugar malabsorption, increased breath H2 excretion does reflect malabsorption. The washout or the mixing of the intestinal content or intergroup difference of fermenting activity of the colonic bacteria do not represent interfering factors and do not modify the accuracy of the H2 breath test in day-to-day clinical practice.
ACCESSION #
10234251

 

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