Hostname: page-component-586b7cd67f-r5fsc Total loading time: 0 Render date: 2024-11-25T21:46:26.505Z Has data issue: false hasContentIssue false

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
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.

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
Copyright
Copyright © JLO (1984) Limited 1987

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Anson, B. J. and Bast, T. H. (1953) The development of the otic capsule in the region of the cochlear fenestra. Annals of Otology Rhinology and Laryngology, 62: 10831116.CrossRefGoogle ScholarPubMed
Banfai, P. (1978) Zugangswege fuer das Cochlear Implant. HNO, 26: 8589.Google Scholar
Burian, K., Hochmair-Desoyer, I. J. and Hochmair, E. S. (1981) Hoeren ueber ein cochlea implantat. Archiv für ONK-Heilkunde, 231: 569570.Google Scholar
Chouard, C. D. and Mac Leod, P. (1976) Implantation of multiple intracochlear electrodes for rehabilitation of total deafness; preliminary report. Laryngoscope, 86: 17431751.CrossRefGoogle ScholarPubMed
Clark, G. M. (1975) A surgical approach for a cochlear implant. Journal of Laryngology and Otology, 89: 915.CrossRefGoogle ScholarPubMed
Clark, G. M., Pyman, B. C. and Bailey, O. R. (1979) The surgery for multiple-electrode cochlear implantations. Journal of Laryngology and Otology, 93: 215223.CrossRefGoogle ScholarPubMed
House, W. F. and Urban, J. (1973) Long term results of electrode implantation and electronic stimulation of the cochlea in man. Annals of Otology, 82: 504517.Google ScholarPubMed
Kubik, S. (1984) In: Cochlear Implants in Clinical Use. Advances in Audiology Vol. 7 (Keidel, W. D. and Finkenzeller, P., eds.) pp. 108118, Karger, S.Google Scholar
Michelson, R. P. (1971) Electrical stimulation of the human cochlea. Archives of Otolaryngology, 93: 317323.CrossRefGoogle ScholarPubMed
Michelson, R. P. and Schindler, R. A. (1981) Multichannel cochlear implant. Preliminary results in man. Laryngoscope, 91: 3842.CrossRefGoogle ScholarPubMed
Scarpa, A. (1772) Anatomical observations concerning the structure of the round window of the ear and the secondary tympanum. Translated by Sellers and Anson 1962. Archives of Otolaryngology, 75: 1645.Google Scholar
Simmons, F. B. (1966) Electrical stimulation of the auditory nerve in man. Archives of Otolaryngology, 84: 254.CrossRefGoogle ScholarPubMed