Related Experiment Videos
Vestibular effects of cochlear implantation
Craig A Buchman1, Jennifer Joy, Annelle Hodges
1Department of Otolaryngology, University of North Carolina at Chapel Hill, 27599-7600, USA. buchman@med.unc.edu
The Laryngoscope
|September 30, 2004
Summary
Cochlear implantation (CI) rarely causes significant vestibular dysfunction. Patients often show improved postural stability after CI, with device activation potentially enhancing this benefit.
Area of Science:
- Otolaryngology
- Neuroscience
- Audiology
Background:
- Cochlear implantation (CI) may pose risks to vestibular function.
- Evolving CI candidate profiles and bilateral CI necessitate understanding these risks.
Purpose of the Study:
- To assess the effects of unilateral cochlear implantation on the vestibular system.
- To evaluate changes in vestibular function and postural stability post-CI.
Main Methods:
- Prospective observational study (1997-2001) in a tertiary care center.
- Utilized Dizziness Handicap Inventory (DHI), Vestibulo-Ocular Reflex (VOR) testing (ENG, SHA), and Computerized Dynamic Platform Posturography (CDP).
- Assessments conducted preoperatively and at 1, 4, 12, and 24 months post-implantation.
Main Results:
- Overall, few significant changes in VOR (ENG, SHA) or DHI scores were observed.
- Significant improvements in postural sway (CDP) were noted at multiple follow-up intervals.
- A subgroup (29%) showed VOR decreases, but without reported disabling vestibular effects or changes in DHI/CDP.
Conclusions:
- Unilateral CI generally has minimal adverse effects on vestibular function.
- CI is associated with significant improvements in objective postural stability.
- Findings suggest CI is safe for the vestibular system and can enhance balance, important for patient counseling.