Physiology of the pylorus, pilleus ventriculi and duodenum as observed roentgenographically / Lewis Gregory Cole.

  • Cole, Lewis Gregory, 1874-1954.
Date:
1913
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Licence: In copyright

Credit: Physiology of the pylorus, pilleus ventriculi and duodenum as observed roentgenographically / Lewis Gregory Cole. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    PHYSIOLOGY OF THE PYLORUS, PILLEUS VENTRICULI AND DUODENUM AS OB- SERVED ROENTGENOGRAPH- ICALLY * LEWIS GREGORY COLE, M.D. Professor of Radiology, Cornell University Medical College NEW YORK Until 1892 the commonly accepted theory of gastric evacuation had been that offered by Richet and Ross- bach, that the stomach contents were first thoroughly mixed with the gastric juices and, after three or four hours, passed rapidly into the duodenum. This concep- tion was discredited by the results of independent inves- tigations on dogs by Hirsch (1892) and Mering (1893), who substituted for it the theory of a rhythmically open- ing and closing pylorus, through which evacuation began immediately after ingestion. In 1898 Cannon announced the discovery of a progressive peristalsis in the cat, and eleven years later Ivaestle, Rieder and Rosenthal dernon- stiated a corresponding phenomenon in the human being. M\ conception of the gastric motor phenomenon has been previously described,1 and will therefore be leferied to only in brief. Like the heart-action, gastric action takes place in cycles, marked by a systole and diastole or an alternating contraction and relaxation of all of the peristaltic waves (Figs. 1 to 4). A cycle exists during the time occupied by the formation and duration ot each terminal wave. Accordingly the number of cycles required for the progress of an individual peristal- tic contraction from its origin near the fundus to its termination at the pyloric sphincter is determined by the number of waves simultaneously exhibited in the stom- Intestinal 1047. 30, 1912, p.