耳小骨奇形症例の検討

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  • Congenital Ossicular Malformations. A Clinical Study.
  • A Clinical Study

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Twenty three patients (26 ears) with congenital ossicular malformations were treated in our department from 1982 through 1993.<br>Malformations of the stapes were the most common, especially fixation of the stapes footplate. Two or more malformations were noted in 10 ears.<br>Of the 15 ears with ossicular chain fixation 11 (73.3%) showed a so-called stiffness curve in the standard audiometric examination. On the other hand, only 4 of the 8 ears (50.0%) with ossicular discontinuity showed a flat hearing curve.<br>Postoperative hearing was improved up to 30dB (JIS standard) or less in 16 ears (61.5%). There was no significant difference in the postoperative hearing between those with ossicular fixation and those with ossicular discontinuity.

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