Distention Of Jejunum Research Articles

RADIOGRAPHIC CHANGES AFTER SMALL BOWEL BYPASS FOR MORBID OBESITY

The presence of multiple intestinal air-fluid levels and the distention of jejunum and colon are common and expected sequelae of small bowel bypass procedures for morbid obesity. The radiologist must be familiar with these findings in order to avoid the misdiagnosis of bowel obstruction.

Gastric and Pancreatic Responses to Jejunal Distention: Effects of extracorporeal mesenteric vascular perfusion

Distention of the proximal jejunum in dogs anesthetized with chloralose and urethane produced an increase in gastric secretion from the intact stomach. In dogs equipped with pancreatic cannulas and given a constant background infusion of commercial secretin, similar distention of the jejunum caused increased protein output in the pancreatic secretion. When the blood supply of the jejunum and ileum were isolated and perfused extracorporeally (the autonomic nerves remaining intact as verified by electrical stimulation), distention of the jejunum produced no increase in gastric acid or pancreatic protein output. In 6 dogs, upon discontinuing the extracorporeal perfusion, the blood supply was successfully reconstituted. Distention of the jejunum again produced an increase in gastric acid or an increase in pancreatic protein output. Ileal absorption of glucose against a concentration gradient remained unaltered throughout. Histology of the bowel was normal. It is concluded that long nervous reflex arcs did not play a significant role in eliciting the gastric or pancreatic response when the small intestine was stimulated by distention under chloralose-urethane anesthesia. Such effects were humoral and were compatible with those of gastrin or cholecystokinin-pancreozymin .

Effect of Distention of Jejunum upon Tonicity of the Gardia of the Dog

Summary and ConclusionsExperiments were undertaken in unanesthetized dogs to study the effect of distention of a segment of jejunum, in the form of a Thiry fistula, upon the tonus of the cardia and upon the relaxation of the cardia resulting from swallowing or from esophageal distention. It was found that the cardia is not easily influenced by changes in jejunal pressure. However, repeated moderate distention of a short jejunal segment may produce a decrease in tonus of the cardia without evidences of nausea or other distress. Secondly, it was found that distention of a jejunal segment does not alter the relaxation-contraction pattern of the cardia which is produced by the swallowing act or by esophageal distention.