Gastroesophageal sphincter: a model

Abstract There is substantial experimental and anatomic evidence suggesting that the human lower esophageal sphincter is not a muscular ring but has its correlate in the arrangement of the so-called muscular clasps and oblique sling fibers at the gastroesophageal junction. We assessed the mode of action of these distinct muscle units in a mechanical model.… Read more »

Mechanisms of action of antireflux surgery: theory and fact

Abstract Despite the absence of definitive explanations regarding either the physiologic or surgical factors which curtail gastro-esophageal reflux, effective antireflux operations exist. This article explores the theoretical factors relevant to the surgical control of reflux. These theoretical features include: (1) the pressure, length, and location of the manometrically defined lower esophageal sphincter (LES); (2) the… Read more »

Responses of feline gastroesophageal junction to changes in abdominal pressure

The responses of the lower esophageal sphincter (LES), stomach, and diaphragm and their contribution to changes in the high-pressure zone (HPZ) at the gastroesophageal junction were determined during extrinsic abdominal compression or intragastric balloon distension in anesthetized cats. Abdominal compression consistently induced an increase in intraluminal end-expiratory LES and gastric pressure (P less than 0.01).… Read more »

A valve mechanism to prevent gastroesophageal reflux and esophagitis

Adler RH, Firme CN, Lanigan JM. A valve mechanism to prevent gastroesophageal reflux and esophagitis. Surgery. 1958;44:63-75. After searches in, and we were unable to locate a digital copy of this peer-reviewed clinical publication. This material may be protected by copyright law. It is our intent to honor Drs Richard H Adler,… Read more »