[Secretin and bicarbonate secretion in probands and ulcer patients following bolus administration of hydrochloric acid into the duodenum].

Various amounts of hydrochloric acid (50, 100 and 200 ml) of two different concentrations (70- and 140 mmol/l) were rapidly instilled into the duodenum of eight healthy subjects and five duodenal ulcer patients. Secretin, gastrin and bicarbonate output were measured. Secretin release and bicarbonate secretion are dependent on acid load and not on acid concentration. There is a linear correlation between the amount of acid instilled into the duodenum and pancreatic bicarbonate output. After duodenal acidification duodenal ulcer patients released equal amounts of secretin and secreted as much bicarbonate as healthy subjects.