The relationship between the intraoperative ECAP threshold and postoperative behavioral levels: the difference between postlingually deafened adults and prelingually deafened pediatric cochlear implant users

Takeshi Morita; Yasushi Naito; Tomoko Hirai; Shinobu Yamaguchi; Juichi Ito

doi:10.1007/s00405-002-0521-7

The relationship between the intraoperative ECAP threshold and postoperative behavioral levels: the difference between postlingually deafened adults and prelingually deafened pediatric cochlear implant users

Eur Arch Otorhinolaryngol. 2003 Feb;260(2):67-72. doi: 10.1007/s00405-002-0521-7. Epub 2002 Sep 4.

Authors

Takeshi Morita¹, Yasushi Naito, Tomoko Hirai, Shinobu Yamaguchi, Juichi Ito

Affiliation

¹ Department of Otolaryngology - Head and Neck Surgery, Graduate School of Medicine, Kyoto University, 54 Shogoin Kawahara-cho Sakyo-ku, Kyoto 606-8507, Japan. morita@hs.m.kyoto-u.ac.jp

PMID: 12582781
DOI: 10.1007/s00405-002-0521-7

Abstract

The purpose of this study was to determine the relationship between electrically evoked compound-action potential (ECAP) thresholds, electrically evoked auditory brain-stem response (EABR) thresholds, behavioral thresholds (T levels) and maximum comfort levels (C levels) in profoundly deaf cochlear-implant users. The ECAP thresholds were measured intraoperatively in eight postlingually deafened adults and nine (eight prelingually and one postlingually deafened) children implanted with the Nucleus CI24 M cochlear implant. The mean ECAP thresholds did not differ between children and adults. The average behavioral T and C levels after at least 6 months of experience with a cochlear implant were significantly higher in children than those in adults. The ECAP thresholds were more strongly correlated with T and C levels in children than in adults. The stronger correlation between ECAP thresholds and behavioral T and C levels in children than in adults might result from differences in loudness sensation, which should in turn depend on auditory experience.

Publication types

Comparative Study
Research Support, Non-U.S. Gov't

MeSH terms

Adult
Age Factors
Auditory Threshold / physiology*
Child
Child, Preschool
Cochlear Implantation / methods*
Deafness / congenital*
Deafness / surgery*
Evoked Potentials, Auditory / physiology*
Evoked Potentials, Auditory, Brain Stem / physiology*
Female
Follow-Up Studies
Hearing Loss, Bilateral / diagnosis
Hearing Loss, Bilateral / surgery*
Humans
Language Development
Male
Middle Aged
Monitoring, Intraoperative / methods
Postoperative Period
Prospective Studies
Risk Assessment
Sampling Studies
Speech Perception
Treatment Outcome