Skip to main content Accessibility help

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

  • Burkhard K. H. Franz (a1), Graeme M. Clark (a2) and David M. Bloom (a2)


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.


Corresponding author

Graeme M. Clark, Ph.D., F.R.C.S., Department of Otolaryngology, University of Melbourne, Parkville 3052, Australia.


Hide All
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.
Banfai, P. (1978) Zugangswege fuer das Cochlear Implant. HNO, 26: 8589.
Burian, K., Hochmair-Desoyer, I. J. and Hochmair, E. S. (1981) Hoeren ueber ein cochlea implantat. Archiv für ONK-Heilkunde, 231: 569570.
Chouard, C. D. and Mac Leod, P. (1976) Implantation of multiple intracochlear electrodes for rehabilitation of total deafness; preliminary report. Laryngoscope, 86: 17431751.
Clark, G. M. (1975) A surgical approach for a cochlear implant. Journal of Laryngology and Otology, 89: 915.
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.
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.
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.
Michelson, R. P. (1971) Electrical stimulation of the human cochlea. Archives of Otolaryngology, 93: 317323.
Michelson, R. P. and Schindler, R. A. (1981) Multichannel cochlear implant. Preliminary results in man. Laryngoscope, 91: 3842.
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.
Simmons, F. B. (1966) Electrical stimulation of the auditory nerve in man. Archives of Otolaryngology, 84: 254.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

The Journal of Laryngology & Otology
  • ISSN: 0022-2151
  • EISSN: 1748-5460
  • URL: /core/journals/journal-of-laryngology-and-otology
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed