Oscillopsia in Bilateral Vestibular Hypofunction: Not Only Gain But Saccades Too.
Ear Hear
; 41(2): 323-329, 2020.
Article
en En
| MEDLINE
| ID: mdl-31517671
OBJECTIVES: Oscillopsia is a disabling condition for patients with bilateral vestibular hypofunction (BVH). When the vestibulo-ocular reflex is bilaterally impaired, its ability to compensate for rapid head movements must be supported by refixation saccades. The objective of this study is to assess the relationship between saccadic strategies and perceived oscillopsia. DESIGN: To avoid the possibility of bias due to remaining vestibular function, we classified patients into two groups according to their gain values in the video head impulse test. One group comprised patients with extremely low gain (0.2 or below) in both sides, and a control group contained BVH patients with gain between 0.2 and 0.6 bilaterally. Binary logistic regression (BLR) was used to determine the variables predicting oscillopsia. RESULTS: Twenty-nine patients were assigned to the extremely low gain group and 23 to the control group. The BLR model revealed the PR score (saccades synchrony measurement) to be the best predictor of oscillopsia. Receiver operating characteristic analysis determined that the most efficient cutoff point for the probabilities saved with the BLR was 0.518, yielding a sensitivity of 86.6% and specificity of 84.2%. CONCLUSIONS: BVH patients with higher PR values (nonsynchronized saccades) were more prone to oscillopsia independent of their gain values. We suggest that the PR score can be considered a useful measurement of compensation.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Movimientos Sacádicos
/
Vestíbulo del Laberinto
Tipo de estudio:
Prognostic_studies
Límite:
Humans
Idioma:
En
Revista:
Ear Hear
Año:
2020
Tipo del documento:
Article
País de afiliación:
España
Pais de publicación:
Estados Unidos