Ross Lynda Marie, Helminski Janet Odry
*Nova Southeastern University, Department of Physical Therapy, Tampa, Florida †Midwestern University, Department of Physical Therapy, Downers Grove, Illinois.
Otol Neurotol. 2016 Jun;37(5):558-63. doi: 10.1097/MAO.0000000000001040.
Determine reliability of horizontal and vertical video head impulse test (vHIT) and effect of maturation on angular vestibular ocular reflex (AVOR) gain estimations and peak head velocities of individual canals in typically developing children and adolescents.
Reliability study.
University research laboratory
: Two normal adults mean age 51.5 ± 0.5 years and 28 typically developing children and adolescents mean age 10 ± 3.5 years (range, 4.33-17.25 years).
Mean AVOR gain estimate and peak head impulse velocity for individual canals.
In adult sample, mean AVOR gain estimates were 1.00 to 1.04 for lateral and 1.07 to 1.13 for vertical canals. In pediatric sample, mean AVOR gain estimates were 1.00 to 1.04 for lateral and 1.03 to 1.08 vertical canals. Mean AVOR gain intrarater reliability scores (intraclass correlation coefficient [ICC] ≥ 0.821 ≤ 0.945) and interrater reliability scores (ICC ≥ 0.800 ≤ 0.971) had good consistency. For each canal, across each age group, the range of percentage of trials with peak head velocities greater than 100 degrees/s was 32 to 49% right lateral, 31 to 49% left lateral, 0 to 11% right anterior, 3 to 4% left anterior, 1 to 7% right posterior, and 2 to 8% left posterior. Children aged less than 12 years, required 10 to 49% more trials compared with adults to obtain five valid, filtered trials. Adolescents required a similar number of trials compared with adults.
In pediatric population, vHIT is a reliable clinical test to quantify individual canal function using high velocity head impulses. With children, it was difficult to acquire head impulse velocities of greater than 100 degrees/s especially in the plane of the vertical canals. These higher head velocities are required to reveal asymmetry in compensatory eye movements.
确定水平和垂直视频头脉冲试验（vHIT）的可靠性，以及成熟度对典型发育儿童和青少年的角前庭眼反射（AVOR）增益估计和各半规管峰值头速度的影响。
可靠性研究。
大学研究实验室
两名正常成年人，平均年龄51.5±0.5岁；28名典型发育儿童和青少年，平均年龄10±3.5岁（范围4.33 - 17.25岁）。
各半规管的平均AVOR增益估计值和峰值头脉冲速度。
在成人样本中，外侧半规管的平均AVOR增益估计值为1.00至1.04，垂直半规管为1.07至1.13。在儿童样本中，外侧半规管的平均AVOR增益估计值为1.00至1.04，垂直半规管为1.03至1.08。平均AVOR增益的评估者内可靠性评分（组内相关系数[ICC]≥0.821≤0.945）和评估者间可靠性评分（ICC≥0.800≤0.971）具有良好的一致性。对于每个半规管，在每个年龄组中，峰值头速度大于100度/秒的试验百分比范围为：右侧外侧32%至49%，左侧外侧31%至49%，右侧前半规管0%至11%，左侧前半规管3%至4%，右侧后半规管1%至7%，左侧后半规管2%至8%。12岁以下儿童比成年人需要多10%至49%的试验次数才能获得5次有效的、经过滤波的试验。青少年所需的试验次数与成年人相似。
在儿科人群中，vHIT是一种可靠的临床测试，可通过高速头脉冲来量化各半规管功能。对于儿童，尤其是在垂直半规管平面内，很难获得大于100度/秒的头脉冲速度。而要揭示代偿性眼球运动的不对称性则需要这些更高的头速度。
