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Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants

Medical University of Hannover

01.06. bis 04.06.2005, Hannover

Preoperative Diagnostics of Residual Hearing

Meeting Abstract

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  • corresponding author M.E. Lutman - Institute of Sound and Vibration Research, University of Southampton

Medical University of Hannover, Department of Otolaryngology. Fourth International Symposium and Workshops: Objective Measures in Cochlear Implants. Hannover, 01.-04.06.2005. Düsseldorf, Köln: German Medical Science; 2005. Doc05omci001

The electronic version of this article is the complete one and can be found online at:

Published: May 31, 2005

© 2005 Lutman.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License ( You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.




Preoperative testing of residual hearing during selection of patients for cochlear implantation aims to assess whether they are likely to benefit more from a cochlear implant than from hearing aids. Stages in the process include: confirmation that the hearing loss is genuine and has been quantified correctly; assessment of the site of lesion (cochlea, auditory nerve, central auditory pathways); assessment of any additional middle-ear involvement; assessment of response to electrical stimulation.

Materials and Methods

Objective measures that may be used in the preoperative phase include: tympanometry and acoustic reflex tests, otoacoustic emissions, auditory evoked potentials (threshold ABR, diagnostic ABR, middle-latency and late potentials), promontory stimulation tests. Vestibular function testing may also be undertaken.


The objectives of the presentation are to review objective procedures used in candidate selection. The review will include results of a survey of cochlear implant clinics concerning their use of objective measures for this purpose.


Conclusions will be drawn concerning existing practice in this area and recommendations for good practice in future.