Application of intraoperative round window electrocochleography for screening the patients with auditory neuropathy.
BACKGROUND
Most patients with auditory neuropathy (AN) could receive good even the best effects after cochlear implantation. How to diagnose AN objectively and accurately is very important. In this study, we screened the patients with AN according to the presence or absence of compound action potential (CAP) of intraoperative round window electrocochleography (RW ECochG).


METHODS
Intraoperative RW ECochG was performed on 32 patients with profound sensorineural deafness, who had normal cochlea during cochlear implantation surgery under general anesthesia in the standard operating room. The cochlear microphonic (CM) and CAP of RW ECochG was observed and recorded.


RESULTS
The presence of CM but the absence of CAP of RW ECochG occurred in 12 among the 32 patients. They were suspected to suffer from AN. The rest patients who had CM and CAP of RW ECochG were thought not to suffer from AN.


CONCLUSIONS
Application of intraoperative RW ECochG during the cochlear implantation surgery may objectively and accurately screen the patients with AN, and can give a meaningful clue for implanted device working.
Wang
Lin-e
LE
Department of Otolaryngology, Beijing Friendship Hospital Affiliated to Capital Medical University, Beijing 100050, China.
Wang
Zhen
Z
Zhang
Dao-xing
DX
Cao
Ke-li
KL
D000293:Adolescent; D000328:Adult; D001300:Audiometry, Evoked Response / Q000379:methods*; D002648:Child; D002675:Child, Preschool; D003056:Cochlear Nerve / Q000473:pathology*; D004594:Electrophysiology / Q000379:methods; D005071:Evoked Potentials; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D012405:Round Window, Ear; D000160:Vestibulocochlear Nerve Diseases / Q000175:diagnosis*; D055815:Young Adult