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CONGENITAL ABSENCE OF OVAL WINDOW Kotaro Baba 1 pp.995-999
Published Date 1973/12/20
DOI https://doi.org/10.11477/mf.1492208003
  • Abstract
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 During the course of operation for the correction of congenital conduction deafness on a patient, the absence of the oval window and the stapedial base was discovered. The remaining part of the middle ear structure the incus, malleus and both cruxcs of the stapes were found to be normal. Otherwise there was no further abnormality.

 The patient was treated with removal of the remaining portion of the stapes and the establishment the oval window.

 Postoperatively, the hearing acuity improved to 35-40 dB loss; whereas, preoperatively, it was 70-75 dB loss.


Copyright © 1973, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 印刷版ISSN 0386-9679 医学書院

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