Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/8861
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Type: Journal article
Title: Characterisation of relaxation of the lower oesophageal sphincter in healthy premature infants
Author: Omari, T.
Miki, K.
Fraser, R.
Davidson, G.
Haslam, R.
Goldsworthy, W.
Bakewell, M.
Dent, J.
Citation: Gut, 1997; 40(3):370-375
Publisher: B M J PUBLISHING GROUP
Issue Date: 1997
ISSN: 0017-5749
1468-3288
Statement of
Responsibility: 
T. I. Omari, K. Miki, G. Davidson, R. Fraser, R. Haslam, W. Goldsworthy, M. Bakewell, and J. Dent
Abstract: BACKGROUND: Gastro-oesophageal reflux disease causes significant morbidity in premature infants, but the role of dysfunction of the lower oesophageal sphincter (LOS) in this condition is unclear. METHODS: Oesophageal manometry was performed after gavage feeding in 13 healthy preterm neonates (postmenstrual age > or = 33 weeks) with a perfused sleeve with side hole assembly. Swallow related (both single and multiple) and transient LOS relaxations (TLOSRs) were identified and the characteristics of these events defined. Reflux was identified with manometric criteria (common cavity episodes). RESULTS: Five hundred and eleven relaxation of the LOS were observed, 55% related to single swallows, 23% related to multiple swallows, and 22% TLOSRs. The time to maximal LOS relaxation was longer for TLOSRs than for single or multiple swallows (mean (SEM) 5.0 (0.3) s v 3.0 (0.1) s and 3.3 (0.1) s, p < 0.0001 and p < 0.005). The durations of multiple swallows and TLOSRs were longer than single swallows (12.2 (0.5) s and 11.2 (0.4) s v 5.3 (0.2) s, p < 0.0001). Most of the oesophageal body common cavity episodes (94%) occurred during TLOSRs. CONCLUSIONS: In healthy preterm infants (postmenstrual age > or = 33 weeks) the motor events associated with LOS relaxation were similar to those seen in healthy adults. TLOSRs may be an important mechanism of reflux in premature infants.
Keywords: Esophagogastric Junction; Humans; Gastroesophageal Reflux; Manometry; Deglutition; Infant, Newborn; Infant, Premature; Female; Male
RMID: 0030004938
DOI: 10.1136/gut.40.3.370
Appears in Collections:Medicine publications

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