Home About us Editorial board Search Ahead of print Current issue Archives Submit article Instructions Subscribe Contacts Login 
ORIGINAL ARTICLE
Year : 2020  |  Volume : 33  |  Issue : 2  |  Page : 375-380

Effect of cochlear implantation on the cervical vestibular evoked myogenic potentials


1 Department of Otorhinolaryngology, Faculty of Medicine, Menoufia University, Menoufia, Egypt
2 Department of Otorhinolaryngology, Military Medical Academy, Cairo, Egypt
3 Department of Otorhinolaryngology, Faculty of Medicine, Ain Shams University, Cairo, Egypt

Correspondence Address:
Ahmed Elshafai
Department of Otorhinolaryngology, Faculty of Medicine, Menoufia University, Menoufia
Egypt
Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/mmj.mmj_538_15

Rights and Permissions

Objective The aim was to evaluate the effect of cochlear implantation (CI) on the cervical vestibular-evoked myogenic potentials (cVEMP), and to examine the correlation between the different approaches of CI and vestibular insult. Background The function of the CI is to bypass the damaged or missing cochlear structures by exciting neurons in the auditory nerve directly with electrical stimuli. Although studies have shown that CI is effective and safe, the potential effects on vestibular function are of clinical concern. Patients and methods Twenty patients with bilateral sensorineural hearing loss subjected to CI surgery by two different surgical techniques (11 with posterior tympanotomy approach, nine with transcanal approach) were enrolled in the study. The patients were subjected to preoperative evaluation of the vestibular function with cVEMP. Revaluation of the vestibular function with the same test was done 2–3 months postoperatively. Results cVEMP results revealed that 7/20 (35%) had abnormal responses preoperatively. There was significant difference between cVEMP results preoperatively and postoperatively where nine patients out of 13 patients (69%) lost cVEMP response postoperatively (P = 0.004). There was no significant difference between the two different surgical approaches used during the study. cVEMP was normal postoperatively when the round window insertion technique was used (80%), while there was loss of cVEMP response postoperatively in all patients (100%) with bony cochleostomy insertion. Conclusion Vestibular system function deficit was found in 69% of CI children as measured by cVEMP postoperatively. There was no significant difference between the classic posterior tympanotomy approach and the transcanal approach regarding the vestibular deficit. Insertion of electrodes through the round window carries less harmful effects to the vestibular system (20%), than insertion through cochleostomy (100%).


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed173    
    Printed16    
    Emailed0    
    PDF Downloaded26    
    Comments [Add]    

Recommend this journal