Performance over time on adults with simultaneous bilateral cochlear implants

Son-A Chang; Richard S Tyler; Camille C Dunn; Haihong Ji; Shelley A Witt; Bruce Gantz; Marlan Hansen

doi:10.3766/jaaa.21.1.5

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Performance over time on adults with simultaneous bilateral cochlear implants

Journal article

Peer reviewed

Performance over time on adults with simultaneous bilateral cochlear implants

Son-A Chang, Richard S Tyler, Camille C Dunn, Haihong Ji, Shelley A Witt, Bruce Gantz and Marlan Hansen

Journal of the American Academy of Audiology, Vol.21(1), pp.35-43

01/2010

DOI: 10.3766/jaaa.21.1.5

PMCID: PMC2850211

PMID: 20085198

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Abstract

Maximum performance and long-term stability of bilateral cochlear implants has become an important topic because there has been increasing numbers of recipients of bilateral cochlear implants. To determine the performance over time (up to 6yr) of subjects with simultaneous bilateral cochlear implants (CI+CI) on word recognition and localization. Over-time investigation of word recognition in quiet (CNC) and sound localization in quiet (Everyday Sounds Localization Test). The subjects were 48 adults who simultaneously received their cochlear implants at the University of Iowa. For word recognition, percent correct scores continuously improved up to 1 yr postimplantation with the most benefit occurring within the first month of implantation. In observing up to 72 mo, the averaged scores reached to the plateau of about 63% correct in CNC after 2 yr (N = 31). But, when we followed 17 subjects who have complete data set between 12 mo and 48+ months, word recognition scores were significantly different from 12 mo to 48 + months, which implies binaural advantages need more time to be developed. Localization test results suggested that the root mean square (RMS) error scores continuously improved up to 1 yr postimplantation with most benefits occurring within the first 3 mo. After 2 yr, the averaged scores reached to the plateau of about 20 degrees RMS error (N = 27). When we followed 10 subjects who have complete data set between 12 mo and 48+ months, localization scores were not improved from 12 mo to 48+ months. There were large individual differences in performance over time. In general, substantial benefits in both word recognition and localization were found over the first 1-12 mo postimplantation for subjects who received simultaneous bilateral cochlear implants. These benefits were maintained over time up to 6yr postimplantation.

Cochlear Implants - standards

Follow-Up Studies

Humans

Middle Aged

Male

Prosthesis Design

Speech Perception - physiology

Young Adult

Hearing Loss, Bilateral - rehabilitation

Speech Reception Threshold Test - methods

Time Factors

Aged, 80 and over

Hearing Loss, Bilateral - surgery

Adult

Female

Aged

Retrospective Studies

Hearing Loss, Bilateral - physiopathology

Details

Title: Subtitle: Performance over time on adults with simultaneous bilateral cochlear implants
Creators: Son-A Chang - Department of Otolaryngology-Head and Neck Surgery, University of Iowa, Iowa City, IA 52242, USA
Richard S Tyler
Camille C Dunn
Haihong Ji
Shelley A Witt
Bruce Gantz
Marlan Hansen
Resource Type: Journal article
Publication Details: Journal of the American Academy of Audiology, Vol.21(1), pp.35-43
DOI: 10.3766/jaaa.21.1.5
PMID: 20085198
PMCID: PMC2850211
NLM abbreviation: J Am Acad Audiol
ISSN: 1050-0545
eISSN: 2157-3107
Publisher: American Academy of Audiology; United States
Grant note: P50 DC000242-22 / NIDCD NIH HHS 5 P50 DC00242 / NIDCD NIH HHS P50 DC000242 / NIDCD NIH HHS M01-RR-59 / NCRR NIH HHS
Language: English
Date published: 01/2010
Academic Unit: Communication Sciences and Disorders; Molecular Physiology and Biophysics; Neurosurgery; Otolaryngology
Record Identifier: 9984002310702771

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