Department of Otolaryngology-Head and Neck Surgery, Nara Medical University, Nara, Japan.
Acta Otolaryngol. 2020 Sep;140(9):728-735. doi: 10.1080/00016489.2020.1766700. Epub 2020 May 21.
The caloric test has been used to evaluate the semi-circular canal function for decades. In 2009, the video head impulse test (vHIT) was introduced, which can be used to evaluate the semi-circular canal function within a short time. Although both tests examine the semi-circular canal, the stimulation methods differ and it is unclear whether the vHIT is equivocal to the caloric test. This study aimed to discern the differences between the vHIT and caloric test. This study comprised 112 patients with vertigo who visited the vertigo/dizziness centre at our university hospital. Each of these patients underwent a caloric test and vHIT within the same day, and their results were compared. Additionally, an electrocochleography (EcoG) examination, glycerol test (G test), and MRI (performed 4 h after an intravenous gadolinium injection) were conducted to evaluate the influence of endolymphatic hydrops (EH) on the caloric test and vHIT results. Differences in the caloric test and vHIT results, among those with and without EH, were observed in 66.7 and 35.3% of patients, respectively. EH resulted in a difference in results between the caloric test and vHIT. Activated hair cell type may also be implicated.
热刺激试验已被用于评估半规管功能数十年。2009 年，视频头脉冲试验（vHIT）问世，它可以在短时间内评估半规管功能。虽然这两种测试都检查半规管，但刺激方法不同，并且不清楚 vHIT 是否与热刺激试验等效。本研究旨在探讨 vHIT 与热刺激试验之间的差异。本研究纳入了 112 例因眩晕就诊于我院眩晕/头晕中心的患者。这些患者均在同一天内接受了热刺激试验和 vHIT，并对其结果进行了比较。此外，还进行了电耳蜗图（EcoG）检查、甘油试验（G 试验）和 MRI（静脉注射钆后 4 小时进行），以评估内淋巴积水（EH）对内淋巴刺激试验和 vHIT 结果的影响。EH 导致热刺激试验和 vHIT 结果的差异分别出现在 66.7%和 35.3%的患者中。EH 导致热刺激试验和 vHIT 结果的差异。激活的毛细胞类型也可能与此相关。
