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A Case of Congenital Ossicular Dislocation Diagnosed by a Sweep Frequency Tympanometry Hiromitsu Saito 1 1Department of Otolaryngology, Tokyo Medical College pp.711-715
Published Date 1991/9/20
DOI https://doi.org/10.11477/mf.1411900343
  • Abstract
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A 19-year-old female complained of a non-progressive hearing loss in the left ear. Otoscopy revealed no abnormal finding in the external car and the ear drum. Audiometry showed 48 dB A-B gap. The tympanogram was A-type with no stapedial reflex. It was impossible to determine the pathology of the ossicular chain by target CT. By the sweep frequency tympanometry, ossi-cular dislocation was strongly suggested because of abnormal values of B-, Z- and P-points. This was confirmed by surgery. The hearing and the sweep frequency tympanogram improved up to normal range after the operation.

The authors feel that the sweep frequency tympanogram is useful for the diagnosis and the preoperative preparation in ossicular abnormalities.


Copyright © 1991, Igaku-Shoin Ltd. All rights reserved.

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電子版ISSN 1882-1316 印刷版ISSN 0914-3491 医学書院

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