Research on the lower esophagus has demonstrated anatomic and functional development during the first weeks of life.1-3 This development affects the different factors responsible for the prevention of gastroesophageal reflux.4-6 In the newborn with an obtuse Hiss angle and an almost nonexistent abdominal esophagus, the antireflux mechanism is based almost entirely on the pressure barrier of the lower esophagus that opposes the gastric fundal pressure. This investigation involves the manometric study of the esophagus in the newborn, as well as maturation of the pressure barriers of this esophageal segment and the influence that certain factors (e.g., gestational age, days after birth, weight) have on it. © 1976.
|Journal||Journal of Pediatric Surgery|
|Publication status||Published - 1 Jan 1976|