Sequential Bilateral Cochlear Implantation: Speech Perception and Localization Pre- and Post-Second Cochlear Implantation Purpose In this study, the authors sought to compare speech perception and localization in subjects who wear 1 cochlear implant (unilateral CI) or 1 cochlear implant and hearing aid (CI+HA) and then receive a second cochlear implant (bilateral CI), and to evaluate the importance of the duration between implant surgeries ... Research Article
Research Article  |   December 01, 2012
Sequential Bilateral Cochlear Implantation: Speech Perception and Localization Pre- and Post-Second Cochlear Implantation
 
Author Affiliations & Notes
  • Camille C. Dunn
    University of Iowa, Iowa City
  • Richard S. Tyler
    University of Iowa, Iowa City
  • Shelley Witt
    University of Iowa, Iowa City
  • Haihong Ji
    University of Iowa, Iowa City
  • Bruce J. Gantz
    University of Iowa, Iowa City
  • Correspondence to Camille C. Dunn: camille-dunn@uiowa.edu
  • Editor and Associate Editor: Larry Humes
    Editor and Associate Editor: Larry Humes×
Article Information
Hearing & Speech Perception / Hearing Disorders / Hearing Aids, Cochlear Implants & Assistive Technology / Research Articles
Research Article   |   December 01, 2012
Sequential Bilateral Cochlear Implantation: Speech Perception and Localization Pre- and Post-Second Cochlear Implantation
American Journal of Audiology, December 2012, Vol. 21, 181-189. doi:10.1044/1059-0889(2012/12-0004)
History: Received January 17, 2012 , Revised May 15, 2012 , Accepted May 20, 2012
 
American Journal of Audiology, December 2012, Vol. 21, 181-189. doi:10.1044/1059-0889(2012/12-0004)
History: Received January 17, 2012; Revised May 15, 2012; Accepted May 20, 2012
Web of Science® Times Cited: 7

Purpose In this study, the authors sought to compare speech perception and localization in subjects who wear 1 cochlear implant (unilateral CI) or 1 cochlear implant and hearing aid (CI+HA) and then receive a second cochlear implant (bilateral CI), and to evaluate the importance of the duration between implant surgeries and duration of deafness.

Method Nine subjects were tested on speech perception in quiet, and 13 subjects were tested on speech perception and localization in noise using an array of 8 loudspeakers. All subjects were tested with unilateral CI prior to bilateral implantation and then again with bilateral CI after at least 3 months of bilateral experience.

Results No significant difference was found between bilateral CI and unilateral CI on averaged speech perception in quiet performance. A significant benefit was found for bilateral CI on averaged speech perception in noise and on localization. Nonsignificant correlations were found for duration between surgeries, duration of deafness, and duration of bilateral use.

Conclusions Improvements for speech perception and localization played in background noise were indicated for most subjects after they received their 2nd implant. The correlations should be reassessed with a larger number of subjects to appropriately evaluate the effects of duration between surgeries, duration of deafness, and duration of bilateral use.

Acknowledgments
This research was supported in part by Grant 2 P50 DC00242 from the National Institute on Deafness and Other Communication Disorders; Grant RR00059 from the General Clinical Research Centers Program, Division of Research Resources, National Institutes of Health; the Lions Clubs International Foundation; and the Iowa Lions Foundation. We would also like to thank MED-EL Corporation for its support in acquiring subjects for this study and Ann Perreau and Stephanie Gogel for helping us to collect data.
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