Objective and subjective evaluations of the Nurotron Venus cochlear implant system via animal experiments and clinical trials.

Abstract:

CONCLUSION:This study described objective and subjective evaluations of the Nurotron® Venus™ Cochlear Implant System and indicated that this system produced a satisfactory performance. OBJECTIVE:To observe the performance of the Nurotron® Venus™ cochlear implant (CI) system via electrophysiological and psychophysical evaluations. METHODS:A 26-electrode CI system was specially designed. The performance of MRI in animal and cadaveric head experiments, EABR in cats experiment, the correlation between ESRT and C level, and psychophysics evaluations in clinical trials were observed. RESULTS:In the animal and cadaveric head experiments, magnet dislocation could not be prevented in the 1.5 T MRI without removal of the internal magnet. The EABR was clearly elicited in cat experiment. In the clinical trial, the ESRT was strongly correlated with C level (p < 0.001). The human clinical trial involving 57 post-lingually deafened native Mandarin-speaking patients was performed. Residual hearing protection in the implanted ear at each audiometric frequency was observed in 27.5-46.3% patients post-operatively. A pitch ranking test revealed that place pitches were generally ordered from apical to basal electrodes. The recognitions of the perceptions of 301 disyllabic words, environment sounds, disyllabic words, and numerals were significantly better than the pre-operative performance and reached plateaus.

journal_name

Acta Otolaryngol

journal_title

Acta oto-laryngologica

authors

Gao N,Xu XD,Chi FL,Zeng FG,Fu QJ,Jia XH,Yin YB,Ping LC,Kang HY,Feng HH,Wu YZ,Jiang Y

doi

10.3109/00016489.2015.1086022

subject

Has Abstract

pub_date

2016-01-01 00:00:00

pages

68-77

issue

1

eissn

0001-6489

issn

1651-2251

journal_volume

136

pub_type

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