Different forms of dizziness occurring after cochlear implant

Citation
T. Kubo et al., Different forms of dizziness occurring after cochlear implant, EUR ARCH OT, 258(1), 2001, pp. 9-12
Citations number
14
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Otolaryngology
Journal title
EUROPEAN ARCHIVES OF OTO-RHINO-LARYNGOLOGY
ISSN journal
0937-4477 → ACNP
Volume
258
Issue
1
Year of publication
2001
Pages
9 - 12
Database
ISI
SICI code
0937-4477(200101)258:1<9:DFODOA>2.0.ZU;2-2
Abstract
Dizziness after cochlear implant (CI) was studied in a series of 94 consecu tive adult patients receiving a cochlear implant. 46 (49.0%) of whom experi enced dizziness post-operatively. In 29 patients, post-operative dizziness occurred soon after surgery and subsided within one month. Dizziness of the continuous type, lasting more than 6 months, was a complaint in only two p atients. In addition to these already known forms of dizziness, spells of v ertigo occurring later than one month after cochlear implant were experienc ed by 15 patients (delayed-V). The spells of delayed-V occurred suddenly an d persisted for several hours. Moreover, 85.7% of delayed-V patients compla ined of hearing and tinnitus abnormalities during these spells. The clinica l features of delayed-V were similar to those in patients with Meniere's di sease. The pre operative bithermal caloric test showed a significantly high er response for the delayed-V group than the other groups (ANOVA: P < 0.05) in terms of slow phase eye velocity of caloric nystagmus. These findings s uggest that inner ear lesions due to cochlear implant surgery develop gradu ally. Similarities in clinical features between de layed-V and Meniere's di sease indicate the presence of labyrinthine hydrops.