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Vol. 66, No. 6, 2004
Issue release date: 2004
Section title: Original Paper
ORL 2004;66:306–312
(DOI:10.1159/000081887)

Preservation of Basal Inner Ear Structures in Cochlear Implantation

Adunka O.a · Gstoettner W.a · Hambek M.a · Unkelbach M.H.a · Radeloff A.a · Kiefer J.b
aENT Department, J.W. Goethe University, Frankfurt am Main, bENT Department, Technical University, Munich, Germany

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Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/1/2004
Published online: 1/25/2005
Issue release date: 2004

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 3

ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)

For additional information: http://www.karger.com/ORL

Abstract

The aim of this report was to examine basal trauma in implanted human temporal bones and discuss modified approaches to the basal cochlear turn to avoid destruction of basal cochlear structures. Thirty-three human temporal bones were implanted with four different cochlear implant electrode arrays manufactured by MED-EL using either a caudal approach cochleostomy or round window membrane insertions. All specimens were processed with a special histological technique that allows sectioning of undecalcified bone with the electrode in situ. All bones were evaluated histologically in terms of basal cochlear trauma. Two pathomechanisms of basal trauma could be distinguished and were evaluated separately, buckling of the basal end of the array and trauma by drilling. Using the caudal approach cochleostomy, the total percentage of destructive basal trauma was 48% compared to less than 15% when performing round window membrane insertions. Although it is still unclear whether basal cochlear trauma influences apical cochlear function or not, adapted surgical procedures and no forceful insertion maneuvers should be used when performing cochlear implantations with hearing preservation.

© 2004 S. Karger AG, Basel


  

Author Contacts

Dr. Oliver Adunka, MD
ENT Department, J.W. Goethe University
Theodor Stern Kai 7
DE–60590 Frankfurt am Main (Germany)
Tel. +49 69 6301 83166, Fax +49 69 6301 5658, E-Mail adunka@em.uni-frankfurt.de

  

Article Information

Received: February 12, 2004
Accepted after revision: July 1, 2004
Number of Print Pages : 7
Number of Figures : 4, Number of Tables : 3, Number of References : 23

  

Publication Details

ORL (Journal for Oto-Rhino-Laryngology and Its Related Specialties)

Vol. 66, No. 6, Year 2004 (Cover Date: 2004)

Journal Editor: B.W. O’Malley, Jr., Philadelphia, Pa.
ISSN: 0301–1569 (print), 1423–0275 (Online)

For additional information: http://www.karger.com/orl


Article / Publication Details

First-Page Preview
Abstract of Original Paper

Received: 7/1/2004
Published online: 1/25/2005
Issue release date: 2004

Number of Print Pages: 7
Number of Figures: 4
Number of Tables: 3

ISSN: 0301-1569 (Print)
eISSN: 1423-0275 (Online)

For additional information: http://www.karger.com/ORL


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