Abstract
The gastric secretion of IF, acid, and pepsin during basal conditions and stimulation by pentagastrin decreased significantly in 8 unoperated duodenal ulcer patients following administration of atropine. The basal concentrations of acid and pepsin decreased, whereas that of IF remained unchanged. An increase of plasma gastrin concentration from the basal value was observed after injection of atropine alone. The secretions of IF and acid decreased significantly from the pre-operative values after proximal gastric vagotomy in 7 duodenal ulcer patients. The basal IF output decreased by 19.8 per cent and the stimulated output by 41.4 per cent. The basal and stimulated secretions of acid decreased by 50.0 and 44.1 per cent, respectively. It is suggested that the smaller reduction of IF than of acid may be of importance for the vitamin B12 absorption after vagotomy. The decreased secretion of IF was secondary to the reduction of volume both after'medical' and surgical vagotomy.
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