Duodenal reflux during insulin-stimulated secretion.

Area of Science:

• Gastroenterology
• Physiology

Background:

• Vagotomy surgery impacts gastric secretion and emptying.
• Understanding duodenal reflux is crucial for managing gastrointestinal disorders.

Purpose of the Study:

• To investigate duodenal reflux during insulin-stimulated gastric secretion.
• To quantify duodenal reflux in various patient groups, including those with duodenal ulcers and post-vagotomy states.

Main Methods:

• Studied 67 subjects with intact vagi during insulin-stimulated secretion.
• Analyzed hydrogen and sodium ion concentrations in gastric samples.
• Used bromosulphalein (BSP) or indocyanine green (ICG) dye excretion in bile to track duodenal reflux.
• Calculated duodenal reflux volume based on sodium output.

Main Results:

• A significant negative correlation was found between hydrogen and sodium ion concentrations, explained by gastric juice and duodenal reflux mixing.
• Dye concentrations in gastric juice correlated positively with calculated duodenal reflux.
• Gastrojejunostomy resulted in substantially higher duodenal reflux compared to other groups.
• Reflux was lower after vagotomy without drainage than in preoperative patients or those with pyloroplasty/gastrojejunostomy.

Conclusions:

• Insulin-stimulated secretion promotes duodenal reflux.
• Surgical procedures, particularly gastrojejunostomy, significantly influence the volume of duodenal reflux.
• Quantification of duodenal reflux using ion and dye markers provides insights into gastrointestinal physiology post-surgery.