Evaluation of quantitative head impulse testing using search coils versus video-oculography in older individuals.
Evaluation of quantitative head impulse testing using search coils versus video-oculography in older individuals.
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DOI：
10.1097/mao.0b013e3182995227
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发表时间：
2014-02
期刊：
影响因子：
--
通讯作者：
Carey JP
中科院分区：
文献类型：
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作者：
Agrawal Y;Schubert MC;Migliaccio AA;Zee DS;Schneider E;Lehnen N;Carey JP
评价2D视频眼电图（VOG）与巩膜搜索线圈在老年人水平AVOR增益估计中的有效性。横断面验证研究。三级护理学术医疗中心。六个70岁以上的人。在水平头部脉冲期间，使用巩膜探测线圈（右眼上方）和EyeSeeCam VOG相机（左眼上方）同时记录眼球运动。最佳估计搜索线圈和VOG水平AVOR增益，使用两种眼动记录技术的代偿性扫视的存在。我们观察到搜索线圈和VOG最佳估计水平AVOR增益之间存在显著相关性（r = 0.86，p = 0.0002）。我们评估了单个头部脉冲，发现来自线圈和VOG系统的头部运动和眼球运动轨迹的形状是相似的。在老年人中看到的眼球运动的具体特征，包括公开和隐蔽的纠正扫视和反代偿眼球运动，被捕获的搜索线圈和VOG系统。这些数据表明，VOG是一个合理的代理搜索线圈眼动记录在老年受试者估计VOR增益和矫正眼球运动的大致时间。VOG提供了传统的搜索线圈方法的优势，它是便携式的，易于使用，允许定量VOR估计在不同的设置，如一个例行的办公室为基础的做法，在床边，并可能在更大规模的人口分析。
To evaluate the validity of 2D video-oculography (VOG) compared with scleral search coils for horizontal AVOR gain estimation in older individuals. Cross-sectional validation study. Tertiary care academic medical center. Six individuals age 70 and older. Simultaneous eye movement recording with scleral search coil (over right eye) and EyeSeeCam VOG camera (over left eye) during horizontal head impulses. Best estimate search coil and VOG horizontal AVOR gain, presence of compensatory saccades using both eye movement recording techniques. We observed a significant correlation between search coil and VOG best estimate horizontal AVOR gain (r = 0.86, p = 0.0002). We evaluated individual head impulses and found that the shapes of the head movement and eye movement traces from the coil and VOG systems were similar. Specific features of eye movements seen in older individuals, including overt and covert corrective saccades and anticompensatory eye movements, were captured by both the search coil and VOG systems. These data suggest that VOG is a reasonable proxy for search coil eye movement recording in older subjects to estimate VOR gain and the approximate timing of corrective eye movements. VOG offers advantages over the conventional search coil method; it is portable and easy to use, allowing for quantitative VOR estimation in diverse settings such as a routine office-based practice, at the bedside, and potentially in larger scale population analyses.