| http://www.w3.org/ns/prov#value | - One object of the invention is to assure the tube enters the esophagus, not the trachea, and in achieving this object I utilize, FIG. 2, a stylet 30 of malleable metal such as copper, a soft bronze or a malleable iron-copper-tin alloy which can be inserted into the proximal portion of the tube and bent so that the tube will assume the general profile of the arch pharyngeal 22, FIG. 1.
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