Abnormal Retraction of Eardrums and Eustachian Tube Dysfunction.

概要

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Tympanic membrane retraction is one of the important sequelae of otitis media with effusion (OME). In this study, the mechanism of atelectasis of the eardrums was investigated from the point of view of eustachian tube dysfunction.One hundred and six ears with refractory OME which were not cured by the age of 10 were examined, because many refractory OME cases exhibit various types of tubal dysfunction, including stenosis and excessive patency.When the relationship between passive tubal function and retraction of the eardrum was examined, the incidence of retraction was found to be significantly higher in ears with low opening pressure of the eustachian tube. Twenty five ears with tubal closing failure, evaluated by the sniffing test, showed a significantly higher incidence of tympanic membrane retraction than did those without evidence of closing failure.These results suggest that retraction of the eardrum is closely related to excessive patency or closing failure of the eustachian tube.
耳鼻咽喉科臨床学会の論文