. Radiography and radio-therapeutics . Pylorus Fig. 298.—Hour-glass contraction of the stomach.(a) Soon after ingestion of food. (h) One hour after ingestion. on the relationship of gastric ulcer to intermittent hour-glass contraction ofthe stomach. These may simulate in every detail true hour-glass contrac-tion. It may take the form of a contraction in the middle of the stomach,with apparently two equal portions, or the upper portion may contain thewhole of the meal. The greater curvature shows a marked depression in other cases. Thereis no reduction of motility, and there may be even an incr
. Radiography and radio-therapeutics . Pylorus Fig. 298.—Hour-glass contraction of the stomach.(a) Soon after ingestion of food. (h) One hour after ingestion. on the relationship of gastric ulcer to intermittent hour-glass contraction ofthe stomach. These may simulate in every detail true hour-glass contrac-tion. It may take the form of a contraction in the middle of the stomach,with apparently two equal portions, or the upper portion may contain thewhole of the meal. The greater curvature shows a marked depression in other cases. Thereis no reduction of motility, and there may be even an increased rapidityin emptying, the administration of atropine leading to no change in thecondition. Such cases require to be examined on more than one occasion before anaccurate diagnosis can be made. There is rarely any residue after six hours,showing that there is no real obstruction to the passage of food. The usualstomach picture may be obtained at one examination, while the hour-glasswill be found at another. It is possible in some
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