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MULTIDIRECTIONAL TOMOGRAPHY OF THE TEMPORAL BONE Ⅰ. CONGENITAL ATRESIA OF THE EXTERNAL AUDITORY MEATUS Tetsuo Ishii 1 pp.573-580
Published Date 1969/8/20
DOI https://doi.org/10.11477/mf.1492207319
  • Abstract
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 Multidirectional tomography was carried out on 10 cases of congenital atresia of the external auditory meatus, in whom tympanoplastic surgery was performed on each. Tomography was done by Multiplanigraphy by Siemens by frontal plane with hypocycloidal movement.

 Eight tomographic films were taken in 1mm thickness by 1mm interval. These pictures revealed the size of the tympanic cavity, the presence of the incus-malleus mass, the bony blockage of the atretic meatal wall, the oval window and the bony labyrinth.

 In this way the preoperative tomographic findings were highly helpful in mapping out the plan of tympanoplasty upon these malformed ears.Type Ⅲ tympanoplasty was performed in 6 cases; type Ⅲ with columella in 2 eases and type Ⅱ in one case. An external auditory canal plasty alone was performed in one case.

 Postoperative follow-up showed that 7 out of 10 cases revealed an improvement of hearing.


Copyright © 1969, 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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