中耳真珠腫再発に関する前鼓室開放術の有用性

Abstract

It is well known that dysfunction of the eustachian tube can cause retraction of the ear drum, and resultant cholesteatoma. In this study, we investigated retrospectively the relationship between reccurence of middle ear cholesteatoma and eustachian tube function.From 1993 to 1996,81 cholesteotoma patients (83 ears) received intact canal wall tympanoplasty in the Department of Otolaryngology at Aichi Medical University. Before surgery, we evaluated their eustachian tube function by sonotubometry and tubotympano aerodynamic graphy (TTAG).They were divided into four groups based upon the presence of a normal or dysfunctional eustachian tube and whether or not they received anterior tympanotomy. The rate of recurrence was lowest in the group who had normal function of the eustachian tube and previous anterior tympanotomy. In contrast, recurrence was most in the group who had a dysfunctional eustachian tube and did not receive anterior tympanotomy.These results indicate that aeration of the middle ear is a significant factor in preventing recurrence of cholesteatoma.