ENT Department, Anadolu Health Center.
Acta Otolaryngol. 2020 Dec;140(12):977-981. doi: 10.1080/00016489.2020.1805123. Epub 2020 Aug 17.
Vestibulo-ocular reflex (VOR) function is expected to be normal in patients with benign paroxysmal positional vertigo (BPPV) during sudden head rotations.
The aim of this study is to analyze VOR by video head impulse test (vHIT) in patients with BPPV in order to determine the potential value of clinical application of vHIT in BPPV.
Sixty patients with BPPV were included for the study from out-patient admissions. The main outcome measures were the gain of VOR, gain asymmetry, and refixation saccades. Fifteen healthy subjects with no history of dizziness were selected as normal control.
Mean VOR gain during lateral head impulse in patients with geotropic type LC BPPV was 0.85 ± 0.22. Mean VOR gain during lateral head impulse in patients with ageotropic type LC BPPV was 0.78 ± 0.16. Fourteen patients with PC BPPV (35%; 40/13) had low gain during ipsilesional head impulses. Seven patients had low gain during counterlesional head impulses. Mean VOR gain during vertical head impulse in patients with PC BPPV was 0.73 ± 0.24. Nine patients with posterior canal BPPV (25%; 9/40) and 2 patients with LC BPPV (11%; 2/18) had corrective saccades. None of the results showed significant difference in comparison to control group.
VHIT analysis demonstrated that VOR function was normal on the BPPV side.
前庭眼反射（VOR）功能预计在良性阵发性位置性眩晕（BPPV）患者进行突然头部转动时正常。
本研究旨在通过视频头脉冲测试（vHIT）分析 BPPV 患者的 VOR，以确定 vHIT 在 BPPV 中的临床应用的潜在价值。
从门诊收治的患者中纳入 60 例 BPPV 患者。主要观察指标为 VOR 增益、增益不对称和固视性眼跳。选择 15 名无头晕史的健康受试者作为正常对照组。
LC 型耳石症向地性 BPPV 患者水平头脉冲时的平均 VOR 增益为 0.85±0.22。LC 型耳石症离地性 BPPV 患者水平头脉冲时的平均 VOR 增益为 0.78±0.16。14 例 PC 型 BPPV 患者（35%；40/13）同侧头脉冲时增益较低。7 例对侧头脉冲时增益较低。PC 型 BPPV 患者垂直头脉冲时的平均 VOR 增益为 0.73±0.24。9 例后管型 BPPV（25%；9/40）和 2 例 LC 型 BPPV（11%；2/18）患者有矫正性眼跳。与对照组相比，这些结果均无显著差异。
VHIT 分析表明，BPPV 侧的 VOR 功能正常。
