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Vestibular dysfunction in cochlear implant candidates: Prevalence and outcomes
Neil Nayak1, Brian Kellermeyer2, Lynette Dornton3
1First Physicians Group Silverstein Institute, 1901 Floyd Street, Sarasota, FL 34239, United States; Ear Research Foundation, 1901 Floyd Street, Sarasota, FL 34239, United States.
American Journal of Otolaryngology
|September 11, 2021
Summary
Preoperative vestibular weakness is common in cochlear implant candidates. Abnormal vestibular test results may predict postoperative dizziness, highlighting the need for preoperative assessment.
Area of Science:
- Otolaryngology
- Neuroscience
- Audiology
Background:
- Cochlear implantation (CI) can impair vestibular function.
- Understanding preoperative vestibular status is crucial for managing CI outcomes.
Purpose of the Study:
- To determine the prevalence of preoperative vestibular weakness in CI candidates.
- To identify risk factors for postoperative dizziness after CI.
Main Methods:
- Retrospective cohort study of 149 patients undergoing CI.
- Preoperative videonystagmography (VNG) assessed vestibular function.
- Primary endpoint: dizziness lasting over one month postoperatively.
Main Results:
- 30.9% had reduced vestibular response (RVR), 21.5% had bilateral vestibular hypofunction (BVH).
- Postoperative dizziness occurred in 9.4% of patients.
- Abnormal preoperative VNG (RVR or BVH) was linked to higher rates of postoperative dizziness (p=0.0497).
Conclusions:
- Preoperative vestibular weakness is prevalent in CI candidates.
- Abnormal preoperative vestibular testing may predict postoperative dizziness.
- Preoperative testing aids counseling and decision-making for CI surgery.
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