Abstract
Objective: To assess the effect of cochlear implantation on the function of the semicircular canals (SCC) and on experienced vestibular symptoms. Second, to determine the relation between vestibular test results. Design: Retrospective cohort study assessing absolute and categorised results of caloric irrigation test, video Head Impulse Test (vHIT) and Dizziness Handicap Inventory (DHI) before and after cochlear implantation. Study sample: 192 patients, aged ≥7 years old, without preoperative areflexia. Results: Mean maximum slow phase velocity decreased with 3.1°/s and 4.7°/s for warm and cold caloric irrigation respectively. About 37.4% of the patients deteriorated one or more categories on caloric testing. Complete caloric postoperative areflexia was found in 6.2%. Mean vHIT gain decreased with 0.06, 0.04 and 0.05 for anterior, lateral and posterior SCC, respectively. Seven patients (7.7%) acquired an abnormal gain value for the anterior SCC. Only mean score on DHI’s physical subdomain rose significantly (1.4 points). Overall, 9.0% of the patients deteriorated one or two categories on DHI. Only few weak correlations were found between caloric test, vHIT and DHI shifts. Conclusions: Although mean objective and subjective-physical vestibular deteriorations were significant, its clinical impact seems limited. However, 9% of patients experience vestibular deterioration, thus, advocate assessment. Vestibular test results show no or merely weak mutual correlations.
Original language | English |
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Pages (from-to) | 843-849 |
Number of pages | 7 |
Journal | International Journal of Audiology |
Volume | 59 |
Issue number | 11 |
DOIs | |
Publication status | Published - 30 Oct 2020 |
Externally published | Yes |
Keywords
- Cochlear implantation
- Dizziness Handicap Inventory
- Vestibular function tests
- Video Head Impulse Test
- caloric test
- vestibulo-ocular reflex
- VERTIGO
- TESTS
- DIZZINESS
- IMPAIRMENT
- VESTIBULAR FUNCTION
- vestibulo-ocular-reflex
- video Head Impulse Test
- vestibular function tests