Passive Opening Function of the Eustachian Tube in Middle Ear Diseases.

概要

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Passive opening pressure in various middle ear diseases were measured with three different ventilatory tests (catheter insuffiation, Valsalva's maneuver and inflation-deflation test). The organic status of the Eustachian tube could be divided into four types: normal, stenotic, patulous and pharyngeal stenotic. The pharyngeal stenotic type was found in half of the patients with otitis media with effusion and in 37.5% of those with adhesive otitis media. In this organic change of the tube, the tube does not dilate with swallowing, because the M. tensor veli palatini is not located in the pharyngeal part of the tube. The pharyngeal stenotic type is thought to be one of the causes of disturbed active ventilation of the middle ear and to play an important role in the pathogenesis of otitis media with effusion and of adhesive otitis media.
耳鼻咽喉科臨床学会の論文