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Vol. 11, Suppl. 1, 2006
Issue release date: October 2006
Section title: Paper
Audiol Neurotol 2006;11:49–56
(DOI:10.1159/000095614)

Ipsilateral Electric Acoustic Stimulation of the Auditory System: Results of Long-Term Hearing Preservation

Gstoettner W.K.a · Helbig S.a · Maier N.a · Kiefer J.b · Radeloff A.a · Adunka O.F.c
aDepartment of Otolaryngology, Johann Wolfgang Goethe University Frankfurt am Main, Frankfurt am Main, bDepartment of Otolaryngology, Klinikum rechts der Isar, Technical University Munich, Munich, Germany; cDepartment of Otolaryngology, University of North Carolina at Chapel Hill, Chapel Hill, N.C., USA

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Article / Publication Details

First-Page Preview
Abstract of Paper

Received: 1/25/2006
Accepted: 8/2/2006
Published online: 10/23/2006
Issue release date: October 2006

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 0

ISSN: 1420-3030 (Print)
eISSN: 1421-9700 (Online)

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

Abstract

Objective: To evaluate long-term ipsilateral hearing preservation in patients who underwent cochlear implantation for the combined electric acoustic stimulation of the auditory system. Methods: This was a prospective observational study conducted at a tertiary referral center. Twenty-three subjects were implanted with the MED-EL C40+ standard or C40+ medium electrode using an atraumatic surgical protocol via an anterior-inferior cochleostomy approach. The desired insertion depth was 18–24 mm or 360°. All patients showed significant low-frequency hearing prior to surgery and monosyllabic word scores did not exceed 40% in the best aided condition. Pure-tone audiometry was performed prior to implantation and at distinct intervals after surgery. Results: Nine patients (39.1%) showed complete pure-tone audiometric hearing preservation (0–10 dB) over an average of 29 months. Seven subjects (30.4%) showed partial preservation of residual hearing (hearing loss 15–40 dB) until an average of 25 months. Delayed loss of residual hearing was observed in 5 cases (21.7%) and 2 patients (8.6%) completely lost residual hearing during or immediately after surgery. Freiburger Monosyllabic word understanding scores in a group of patients with complete hearing preservation increased from 13.1% preoperatively to 75% in the electric acoustic stimulation condition. Conclusion: This study documents that complete and partial preservation of ipsilateral hearing after cochlear implantation can be achieved in about 70% of cases over an average period of 27.25 months when using 360° electrode insertions.

© 2006 S. Karger AG, Basel


  

Article Information

Received: January 25, 2006
Accepted after revision: August 2, 2006
Published online: October 6, 2006
Number of Print Pages : 8
Number of Figures : 4, Number of Tables : 0, Number of References : 26

  

Publication Details

Audiology and Neurotology (Basic Science and Clinical Research in the Auditory and Vestibulary Systems and Diseases of the Ear)

Vol. 11, No. Suppl. 1, Year 2006 (Cover Date: October 2006)

Journal Editor: Harris, J.P. (San Diego, Calif.)
ISSN: 1420–3030 (print), 1421–9700 (Online)

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


Article / Publication Details

First-Page Preview
Abstract of Paper

Received: 1/25/2006
Accepted: 8/2/2006
Published online: 10/23/2006
Issue release date: October 2006

Number of Print Pages: 8
Number of Figures: 4
Number of Tables: 0

ISSN: 1420-3030 (Print)
eISSN: 1421-9700 (Online)

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


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