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SCHILLER, C.; FRÖHLICH, C.‐P.; GIESSMANN, T.; SIEGMUND, W.; MÖNNIKES, H.; HOSTEN, N.; WEITSCHIES, W.
Alimentary pharmacology & therapeutics, November 2005, Letnik: 22, Številka: 10Journal Article
Summary Aim : The gastrointestinal transit of sequentially administered capsules was investigated in relation to the availability of fluid along the intestinal lumen by magnetic resonance imaging. Methods : Water‐sensitive magnetic resonance imaging was performed on 12 healthy subjects during fasting and 1 h after a meal. Specifiable non‐disintegrating capsules were administered at 7, 4 and 1 h prior to imaging. Results : While food intake reduced the mean fluid volumes in the small intestine (105 ± 72 mL vs. 54 ± 41 mL, P < 0.01) it had no significant effect on the mean fluid volumes in the colon (13 ± 12 mL vs. 18 ± 26 mL). The mean number of separated fluid pockets increased in both organs after meal (small intestine: 4 vs. 6, P < 0.05; large intestine: 4 vs. 6, P < 0.05). The distribution of capsules between the small and large intestine was strongly influenced by food (colon: 3 vs. 17 capsules, P < 0.01). Conclusions : The results show that fluid is not homogeneously distributed along the gut, which likely contributes to the individual variability of drug absorption. Furthermore, transport of fluid and solids through the ileocaecal valve is obviously initiated by a meal‐induced gastro‐ileocaecal reflex.
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