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Mechanical interference with the action of the stomach naturally divides itself into two classes: 1, those which act from within the cavity of the stomach or its immediate connections, such as a tumor, cicatrix or a foreign body which may obstruct its inlet, outlet or prevent its normal muscular action; 2, those which act from without the stomach and interfere either by pressure or adhesions, obstructing its inlet or outlet or fixing some portion of its wall, thus preventing its functions.
Methods of diagnosis: For practical purposes the history, the physical examination, the distension with air and the test meal, constitute our main diagnostic resources. A careful history includes the early symptoms, pain, tumor or swelling, vomiting with its character, and such other evidences as suggest themselves. The distention of the stomach with air to facilitate mapping out its outline is an exceedingly important factor in the diagnosis. With an
MAYO WJ. SOME MECHANICAL CAUSES OF INTERFERENCE WITH THE ACTION OF THE STOMACH AND THEIR SURGICAL RELIEF.. JAMA. 1896;XXVI(23):1101–1103. doi:10.1001/jama.1896.02430750003001a