Influence of evoked compound action potential on speech perception in cochlear implant users

Revista Brasileira de Otorrinolaringologia

Guedes, Mariana Cardoso¹  Goffi Gomez, Maria Valéria S¹  USP¹  Weber, Raimar¹  Irmandade Santa Casa de Misericórdia de São Paulo¹  Peralta, Cristina Gomes O¹  Brito Neto, Rubens Vuono de¹  Bento, Ricardo Ferreira¹  UNIFESP¹  Universidade de São Paulo¹  PUC¹ 

关键词: cochlear implants;    cochlear nerve;    speech perception;    action potentials;    auditory evoked potentials;    auditory pathways.;   

DOI  :  10.1590/S0034-72992007000400002

学科分类：医学（综合）

来源: Associacao Brasileira de Otorrinolaringologia e Cirurgia Cervicofacial

【 摘 要 】

Electrically Evoked Compound Action Potential is a measure of synchronous cochlear nerve fibers activity elicited by electrical stimulation of the cochlear implant. The electrophysiological nerve responses may contribute to explain the variability in individual performance of cochlear implant recipients.AIM: To compare speech perception testsÂ’ performances of cochlear implant users according to the presence or absence of intraoperative neural telemetry responses.MATERIAL AND METHOD: Prospective study design with 100 "Nucleus 24" cochlear implant users divided in two groups according to the presence or absence of intraoperative neural telemetry responses. Speech perception tests were performed after 6 months of continuous use of the device and compared among groups.RESULTS: Intraoperative action potentials were observed in 72 % of individuals. Open-set sentence test results were better in implant users who had neural telemetry responses when compared to implant users in whom this potential was absent (averages 82.8 % versus 41 %, p = 0.005). There was a strong association between post meningitis-related deafness and absence of intraoperative potentials.CONCLUSION: The absence of intraoperative neural telemetry responses was associated with worse performances in speech perception tests and meningitis as etiology of deafness. On the other hand, the presence of these potentials suggests excellent prognosis.

【 授权许可】

Unknown