| Autor: |
Rădulescu, L., Mârțu, C., Cozma, S., Butnaru, C., Lungu, A., Alexe, C., Cobzeanu, B., Mârțu, D. |
| Předmět: |
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| Zdroj: |
Journal of Hearing Science; 2018, Vol. 8 Issue 2, p321-322, 2p |
| Abstrakt: |
Objective: Benign paroxysmal positional vertigo (BPPV) is the most common vestibular disorder and may account for up to one-third of vertigo presentations to dizziness clinics. The aim of this study is to compare and to emphasise the features of BPPV secondary to cochlear implant (CI) surgery with those of BPPV secondary to other aetiologies and to review the literature. Material and Methods: We present a retrospective study based on medical record review on a cohort of adults undergoing bilateral CI. The study included 33 consecutive patients who underwent vestibular evaluation before and after CI surgery (caloric test, head impulse test, cervical and ocular vestibular evoked myogenic potentials - cVEMP and oVEMP). Results and Conclusions: BPPV occurred in 2 patients (on the cochleostomy side). The onset occurred before activation in one patient and 2 days after in the other one, but in 30 days frame from surgery in both cases. In the control group we did not find vestibular complains after the surgery, but we found, in most of the control cases, that cVEMP responses were absent. The absence of cVEMP responses was found also in both patients with BPPV. The repositioning manoeuvres were effective in both patients, with no recurrence so far. In each of our BPPV patients a mild feeling of imbalance persisted for several days after the repositioning manoeuvres, which can be considered secondary to trauma insertion of the electrode through cochleostomy. To consider the diagnosis of BPPV secondary to CI surgery, the onset of symptoms has to be in a frame of maximum 30 days after the surgery - after this period the otoliths being phagocytise by the dark cells - there will be no more particles left to trigger the BPPV. In patients with BPPV secondary to CI surgery the symptoms are slightly different from the classic presentation do to the superposition of the utricular damage (cVEMP absent) that appears to be secondary to electrode insertion through cochleostomy. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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