ABSTRACT: We aimed to determine whether the newborn lamb at term is a valid model for studying gastroesophageal reflux. Seven bottle-fed lambs, ages 2 to 3 days, underwent esophageal multichannel intraluminal impedance-pH monitoring (MII-pH). A total of 196 reflux episodes were recorded, including 73% alkaline and 27% weakly acidic. No acid refluxes were observed. Median bolus clearance time was 4 seconds (3; 5.5), and proximal reflux extent was 35% (26). This first report of MII-pH in the newborn mammal sets the foundations for future studies with physiological and clinical relevance to human neonates.
Neonatal Respiratory Research Unit, Department of Pediatrics and Physiology, Université de Sherbrooke, Sherbrooke, Quebec, Canada.
Address correspondence and reprint requests to Djamal-Dine Djeddi, MD, PhD, Departments of Pediatrics and Physiology, Université de Sherbrooke, Sherbrooke, QC J1H 5N4, Canada (e-mail: firstname.lastname@example.org).
Received 5 March, 2012
Accepted 7 June, 2012
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D.D. was supported by the Department of Pediatrics, Amiens University Hospital, France. The study was also supported by grants from the Canadian Institutes of Health Research, the Canada Foundation for Innovation, and the Canada Research Chair in Neonatal Respiratory Physiology allocated to J.P.P. J.P.P. is a member of the FRSQ-funded Clinical Research Center Étienne-Le Bel, Sherbrooke University Hospital.