1 Division of Pediatric Gastroenterology, University of Tennessee Center for Health Sciences, LeBonheur Children's Medical Center, 848 Adams Ave, Memphis, TN 38103
To the Editor.
The series of papers on infant apnea in the May 1983 issue of Pediatrics was interesting reading. I am curious about two aspects of the esophageal pH probe studies reported by Rosen et al.1
The authors do not specify the temporal relationship between feeding and their polygraphic studies; presumably infants were fed during both the 12-hour nocturnal studies and the eight-hour daytime studies. The material fed is quite important in pH probe studies, because frank vomiting may occur following a milk meal without a drop in esophageal pH.