| Autor: |
Peter, Corinna S, Wiechers, Cornelia, Bohnhorst, Bettina, Silny, Jiri, Poets, Christian F |
| Zdroj: |
Journal of Pediatric Gastroenterology & Nutrition; Mar2003, Vol. 36 Issue 3, p381-384, 4p |
| Abstrakt: |
Background: Multiple intraluminal impedance (MII) is a new technique that allows detection of reflux and swallows via changes in impedance caused by a liquid bolus inside the esophagus. The method is independent of pH. The authors studied the ability of this technique to detect the small bolus volumes potentially occurring in young infants.Methods: Ten preterm infants (median gestational age at birth, 33 weeks; range, 25-36 weeks; age at study, 9 days; range, 2-39 days) underwent 10 instillations each of 0.1 mL to 0.5 mL saline while MII was recorded via a 2.4-mm nasogastric catheter. MII signals were analyzed for swallows, defined as a decrease in impedance starting within 1 minute. From the liquid instillation in the most proximal channel and extending downward, impedance changes during these induced swallows were compared with those occurring during spontaneous swallows.Results: All 100 liquid instillations resulted in a typical impedance pattern, occurring after a median interval of 4.4 seconds (range, 1.8-8.9 seconds). The decrease in impedance was more pronounced than after spontaneous swallows (30% vs. 24%, P < 0.03) and extended downward more rapidly (12.3 cm/s vs. 5.8 cm/s, P < 0.01).Conclusion: Bolus transport of small liquid volumes can be detected via MII. [ABSTRACT FROM AUTHOR] |
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