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Surgical anatomy of the round window with special reference to cochlear implantation

Published online by Cambridge University Press:  29 June 2007

Burkhard K. H. Franz ,
Graeme M. Clark  and
David M. Bloom
Burkhard K. H. Franz
Affiliation:
Department of Otolaryngology, University of Melbourne, Parkville 3052, Australia.
Graeme M. Clark*
Affiliation:
Melbourne, Australia
David M. Bloom
Affiliation:
Melbourne, Australia
*
Graeme M. Clark, Ph.D., F.R.C.S., Department of Otolaryngology, University of Melbourne, Parkville 3052, Australia.
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Abstract

When the multi-channel cochlear implant electrode is inserted into the scala tympani through the round window the operation is best performed via a posterior tympanotomy. The view of the round window membrane, however, is incomplete because of its orientation and the fact that it has a conical shape. Nevertheless, a good view along the basal turn is obtained after the antero-inferior overhang of the round window niche and the crista fenestrae have been removed. It might be damaging to drill away the postero-superior overhang as the osseous spiral lamina lies extremely close to the round window membrane.

Type
Research Article
Information
The Journal of Laryngology & Otology , Volume 101 , Issue 2 , February 1987 , pp. 97 - 102
Copyright
Copyright © JLO (1984) Limited 1987

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