Establishment and rudimentary application of the method of recording auditory brainstem responses electrically stimulated via round-window niche in cochlear implants
10.3321/j.issn:1673-0860.2008.09.005
- VernacularTitle:术中经蜗窗龛电刺激记录听性脑干反应方法的建立及初步应用
- Author:
Jing-Ning CHENG
1
;
Ke-Li CAO
;
Chao-Gang WEI
;
Li-Jun YANG
;
Lan LUAN
;
Huan LI
;
Yuan LI
;
Qiu-Hang ZHANG
Author Information
1. 卫生部中日友好医院
- Keywords:
Evoked potentials,auditory,brain stem;
Round window;
Cochlear implantation
- From:
Chinese Journal of Otorhinolaryngology Head and Neck Surgery
2008;43(9):653-659
- CountryChina
- Language:Chinese
-
Abstract:
Objective To establish the method of recording auditory bralnstem responseselectrically stimulated via round·window niche in cochlear implants.Methods Self-made phfinum iridiumauoy as a spherical electrode stimulation electrode,modified cochlear implants connected to in vitro speech processor 88 a electro·stimulator and evoke potential instrument for Bio-logic Navigator Pro,17 cechlear implant patients with various ages and of d～erent CaUlS,including auditory neuropathy(2 CS84gS),08si6ed cochlea(1 case),inner ear malformation(5 cases),leukodystrophy(1 case),unknown and reason(8 cases)were investigated during cochlear implant surgery.Before cochlear implantation,stimulation electrode was placod in the round.wiMow niche while charge balanced biphasic constant current Was used as electrical stimulation via round window niche,and then electrically evoked auditory brainstem responge was recorded.Results Electrically evoked auditory brainstem response waveforms were clearlv recorded in all 17 cases.The Iatencies of Ⅲ and Ⅴ waves were(2.12±0.18)ms and(4.18±0.19)ms respectively,with threshold as (220.0±16.04)CL.Thewaveforms of the 2 patientswith auditory neuropathy,5 pailentswithinner ear malformation.1 patient with ossifiod cochlea and 1 patient with leukodystrophy were well differentiated.Conclusions Monitoting electrically evoked auditory brainstem response was an obiective nerve electmphysiological testing method that accurately reflects function complexness of auditory pathway.It had important value for helping making the judgment whether patients could acquire auditory response after cochlear implantation.This method Was safe and gave high emission of auditory response,therefore should be spread widely.
