ArticleWorld journal of gastrointestinal pathophysiology2025
Delayed orocecal transit in pediatric gut-brain interaction disorders: A comparative study using the lactulose breath test.
Article in World journal of gastrointestinal pathophysiology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundFunctional abdominal pain disorders (FAPDs) are common gut-brain interaction disorders with unclear pathophysiology. While impaired gastrointestinal motility is thought to play a key role, small intestinal dysmotility remains largely unexplored. Orocecal transit time (OCTT), an indirect indicator of small intestinal transit, offers an insight into its potential contribution to FAPD's pathophysiology.
aimTo assess OCTT in children with FAPDs compared with healthy children using the lactulose breath hydrogen test.
methodsThirty-four children (44.1% males, age 5-12 years, mean 7.2 ± 2.4 years) with FAPDs attending North Colombo Teaching Hospital, Ragama, Sri Lanka, were included in the analysis. FAPDs were diagnosed using the Rome IV criteria. None had clinical or laboratory evidence of organic diseases. They were compared with 19 healthy controls (47.1% males, age 5-12 years, mean 7.8 ± 2.7 years) from the same geographical area. OCTT was calculated after an 8-hour fast using a previously validated technique. Breath hydrogen levels were measured at baseline and 15-minute intervals for 180 minutes post-lactulose ingestion (10 g in 10% solution). At each time point, 3 breath samples were collected and analyzed. OCTT was quantified as the time taken to achieve a sustained breath hydrogen increase > 10 parts per million above baseline. Symptoms were recorded using the Rome IV questionnaire, and symptom severity was graded on a 0-4 Likert scale.
resultsPatients with FAPDs had increased OCTT (median, 90 minutes; interquartile range, 75-120 minutes) compared to controls (median, 75 minutes; interquartile range, 60-75 minutes) (
conclusionChildren with FAPDs have longer OCTT than healthy controls. However, the lack of a significant correlation between OCTT and symptom severity suggests that delayed small intestinal transit alone is not a substantial contributor to FAPD pathophysiology.
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