Recent experimenters have shown that duodenal contents normally are regurgitated into the stomach toward the close of gastric digestion. This finding, together with the frequency with which reverse movements of barium are seen during radiographic examinations of the gastro-intestinal tract1—partial duodenal obstruction—prompted the present direct study of movements in the human duodenum.
It is not my purpose in this paper to set forth evidence either for or against any particular theory pertaining to the physiology of the duodenum. However, the results obtained by a specific method of duodenal injection will be presented and discussed in the light of modern theories. Whether or not the observations will be of use from a physiologic or clinical standpoint requires corroborative evidence; the amount of information to date is insufficient to warrant general conclusions.
A small duodenal tube with a metallic tip is passed into the stomach, the contents of the
WHEELON H. DUODENAL MOTILITY: RADIOGRAPHIC OBSERVATIONS FOLLOWING THE DIRECT INJECTION OF BARIUM INTO THE HUMAN DUODENUM. JAMA. 1923;80(9):615–620. doi:10.1001/jama.1923.02640360023008
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