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  • Nasopharyngeal catheters designed to open the tube that connects the middle ear and the nasopharynx (eustachian tube). These catheters usually consist of a curved metal tube. The distal tip of the catheter is passed along the floor of the nose and turned into the eustachian tube, and air from an air bag is blown through the catheter, forcing air into the middle ear. Eustachian catheters are used for temporary equalization of the pressure on both sides of the eardrum in patients who cannot open the eustachian tube physiologically.
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