Sensitivity and specificity of averaged electrode voltage measures in cochlear implant recipients

Michelle L Hughes; Carolyn J Brown; Paul J Abbas

doi:10.1097/01.aud.0000145111.92825.cc

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Sensitivity and specificity of averaged electrode voltage measures in cochlear implant recipients

Journal article

Peer reviewed

Sensitivity and specificity of averaged electrode voltage measures in cochlear implant recipients

Michelle L Hughes, Carolyn J Brown and Paul J Abbas

Ear and hearing, Vol.25(5), pp.431-446

10/2004

DOI: 10.1097/01.aud.0000145111.92825.cc

PMID: 15599191

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Abstract

The primary purpose of this study was to evaluate the diagnostic accuracy of averaged electrode voltages (AEVs) for identifying malfunctioning electrodes in cochlear implant users. AEVs were measured using common ground (N = 33 ears) and monopolar stimulation modes (N = 40 ears) in adult subjects implanted with the Nucleus 24M or Nucleus 24R(CS) cochlear implant. AEV measures were then compared with common ground electrode impedance measures as well as to subjective judgments of electrode sound quality to determine the sensitivity and specificity of AEVs. Results showed excellent specificity for both modes of AEV testing: 97.9% for common ground and 99.8% for monopolar. Sensitivity for common ground AEV testing was 91.7%; however the sensitivity of monopolar AEVs was very poor, at 7.7%. Monopolar AEVs accurately identified open circuits but missed all short circuits. These results are consistent with the sensitivity of impedance measures made with each of the two stimulation modes. Common ground AEVs are more reliable than monopolar AEVs for identifying malfunctioning electrodes.

Cochlear Implants - standards

Reproducibility of Results

Humans

Middle Aged

Child, Preschool

Infant

Male

Electric Impedance

Telemetry

Electric Stimulation - instrumentation

Electrodes - standards

Sensitivity and Specificity

Adolescent

Aged, 80 and over

Adult

Female

Aged

Deafness - therapy

Child

Details

Title: Subtitle: Sensitivity and specificity of averaged electrode voltage measures in cochlear implant recipients
Creators: Michelle L Hughes - Department of Otolaryngology, Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa, USA
Carolyn J Brown
Paul J Abbas
Resource Type: Journal article
Publication Details: Ear and hearing, Vol.25(5), pp.431-446
Publisher: United States
DOI: 10.1097/01.aud.0000145111.92825.cc
PMID: 15599191
ISSN: 0196-0202
eISSN: 1538-4667
Grant note: DC00242 / NIDCD NIH HHS RR59 / NCRR NIH HHS
Language: English
Date published: 10/2004
Academic Unit: Communication Sciences and Disorders; Otolaryngology
Record Identifier: 9984002486002771

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