Effect of Gaze Angle During the Vertical Video Head Impulse Test Across Two Devices in Healthy Adults and Subjects With Vestibular Loss
| Autor: | Jessie N. Patterson, Kamran Barin, Amanda I. Rodriguez, Kristen L. Janky |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Adult
Male medicine.medical_specialty genetic structures Bilateral Vestibulopathy Audiology Vestibular loss Article Standard deviation 03 medical and health sciences 0302 clinical medicine Saccades medicine Humans Prospective Studies 030223 otorhinolaryngology Head Impulse Test Vestibular system business.industry Head impulse test Reflex Vestibulo-Ocular medicine.disease Bilateral vestibulopathy Gaze Semicircular Canals Sensory Systems Otorhinolaryngology Reflex Neurology (clinical) Vestibulo–ocular reflex business 030217 neurology & neurosurgery |
| Zdroj: | Otol Neurotol |
| ISSN: | 1537-4505 1531-7129 |
| DOI: | 10.1097/mao.0000000000002652 |
| Popis: | Objective To evaluate the effect of gaze angle on vertical vestibulo-ocular reflex (VOR) gain using two different video head impulse (vHIT) devices in healthy adults and subjects with bilateral vestibular loss (BVL). Study design Prospective study. Setting Hospital research laboratory. Subjects Twenty-four healthy adults (mean [standard deviation {SD}] age = 32 [4.8]; 23-42; 8 men) and four subjects with previously diagnosed BVL (mean age [SD] = 32 [8.2]; 21-40; 3 men) participated. Intervention Vertical canal vHIT was administered with two different devices using three gaze angles (-45 degrees, 0 degree, +45 degrees). These devices have different gain calculation algorithms and different head and gaze angle protocols. Main outcome measures Vertical canal gain and presence or absence of reset saccades. Results A significant stepwise reduction in vHIT gain was noted as gaze moved away from the plane of the canals stimulated (from -45 degrees to 0 degree, to +45 degrees) for both healthy adults and subjects with BVL. vHIT gain was able to separate the two groups using gaze angles -45 degrees and 0 degree. Conclusions In spite of their differences in gain algorithm and recommended head position and gaze angle, each device was able to appropriately separate healthy adults from subjects with BVL with high sensitivity/specificity. |
| Databáze: | OpenAIRE |
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