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The tube is made of soft rubber, but, though readily flexible, is nevertheless rigid enough, owing to its size and the thickness of its walls, to avoid all danger of coiling or kinking in the pharynx or esophagus. It is 84 cm. (32 inches) long, rounded and solid at its lower end, with two lateral openings, one about 2 cm. (three-fourths inch) from the end, the other just above it on the opposite side. These openings run obliquely upward, and have no sharp edges; the edges have been smoothed away in molding (velvet-catheter eye), so that traumatism or other injury to the mucous membrane from contact is impossible. The openings are large, rendering aspiration of the stomach contents easy. The lower end is made solid so that no particles of food can accumulate there, as frequently occurs in tubes with a terminal culdesac. The main distinguishing feature of this stomach
Aaron CD. AN IMPROVED STOMACH TUBE. JAMA. 1915;LXV(21):1813–1814. doi:10.1001/jama.1915.25810210001017b
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