gms | German Medical Science

78. Jahresversammlung der Deutschen Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

Deutsche Gesellschaft für Hals-Nasen-Ohren-Heilkunde, Kopf- und Hals-Chirurgie e. V.

16.05. - 20.05.2007, München

Cochlear implant outside the cochlea: migration or via falsa?

Meeting Abstract

  • corresponding author Nikolaos Marangos - Center Otorhinolaryngology, Head & Neck and Skull Base Surgery, Athens, Greece
  • Anna Papadopoulou - Center Otorhinolaryngology, Head & Neck and Skull Base Surgery, Athens, Greece
  • Apostolos Papadopoulos - Center Otorhinolaryngology, Head & Neck and Skull Base Surgery, Athens, Greece
  • Konstantina Karra - Center Otorhinolaryngology, Head & Neck and Skull Base Surgery, Athens, Greece

German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. 78th Annual Meeting of the German Society of Oto-Rhino-Laryngology, Head and Neck Surgery. Munich, 16.-20.05.2007. Düsseldorf, Köln: German Medical Science; 2007. Doc07hno019

Die elektronische Version dieses Artikels ist vollständig und ist verfügbar unter: http://www.egms.de/de/meetings/hno2007/07hno019.shtml

Veröffentlicht: 8. August 2007

© 2007 Marangos et al.
Dieser Artikel ist ein Open Access-Artikel und steht unter den Creative Commons Lizenzbedingungen (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.de). Er darf vervielf&aauml;ltigt, verbreitet und &oauml;ffentlich zug&aauml;nglich gemacht werden, vorausgesetzt dass Autor und Quelle genannt werden.


Gliederung

Text

Introduction: Although electrode migration after successful cochlear implantation is reported in 1.4%, wrong placement of the electrode is not discussed frequently.

Method: After 20 years of experience in implanting intracochlear multichannel systems, more than 1000 cases have been retrospectively reviewed and electrode migration has never been observed.

Results: Postoperative correct electrode placement has been radiologically confirmed in all cases and intracochlear position never changed. However, false placement of the electrode in the hypotympanon or in the carotid canal was found in 4 cases, although correct intraoperative placement but migration had been reported by the previous surgeons in two cases and wrong placement was not detected in the other two! In three cases the cochlea was patent and in one case obliterated after meningitis, so that partial insertion could be achieved in the revision surgery. Further, the electrode array was placed in the lateral part of the basal cochlear turn due to medial obliteration after fracture requiring revision surgery in one case and in the internal auditory canal in another case with X-linked deafness. This has been detected intraoperatively by X-ray and successfully repositioned.

Conclusion: Postoperative electrode migration seems to be very rare. Probably most of the reported cases were initial wrong placements that have been explained as migrations. Thus, intaoperative electrophysiological or even radiological control is recommended in any uncertain case or inexperienced surgeon.