Otorhinolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran.
Otorhinolaryngology Research Center, Tehran University of Medical Sciences, Tehran, Iran,
ORL J Otorhinolaryngol Relat Spec. 2021;83(4):242-251. doi: 10.1159/000513628. Epub 2021 Mar 17.
The categorization of delayed endolymphatic hydrops (DEH) based on the ear which produces vertigo may sometimes cause misdiagnosis.
The aim of this study was investigating the vestibular-evoked myogenic potentials (VEMPs), electrocochleography (ECoG), and videonystagmography (VNG) in cases with DEH to determine the ear that originates symptoms.
In this cross-sectional study, 34 patients - 20 males and 14 females - with profound unilateral sensorineural deafness and vertigo attacks were recruited and evaluated by the ECoG, VNG, and VEMPs tests.
The average age was around 43; the summating potential/action potential was abnormal in 29.4% of patients in their normal auditive ear. In 32.4, 17.6, and 50% of cases with a deaf ear, absent, normal, and abnormal VEMPs results were sequentially observed, respectively. In normal-hearing ears, absent, normal, and abnormal VEMPs were observed in 23.5, 50, and 26.5%, respectively. In the normal-hearing ear, the distribution of abnormal VEMPs was 26.5%, and in the deaf ear, this parameter was abnormal in 50% of the opposite ear (p value = 0.00021). In the VNG test, among patients with a normal-hearing ear, results in 27 and 7 patients were sequentially normal and hypofunction.
The probability of a hypofunction VNG test in a normal-hearing ear might be greater when the VEMPs results of the contralateral deaf ear are normal. In patients with a normal-hearing ear, the distribution of abnormal VEMPs in the contralateral deaf ear is greater, although the intact side may also manifest abnormality in VEMPs tests. The initial evaluation should begin in a deaf ear as well as for the normal-hearing ear ere utilizing ablation surgery.
根据产生眩晕的耳朵对延迟性内淋巴积水（DEH）进行分类有时可能会导致误诊。
本研究旨在通过研究前庭诱发肌源性电位（VEMPs）、耳蜗电图（ECoG）和视频眼震图（VNG）来确定产生症状的耳朵，以调查 DEH 病例。
在这项横断面研究中，招募了 34 名单侧感觉神经性耳聋伴眩晕发作的患者（20 名男性和 14 名女性），并通过 ECoG、VNG 和 VEMPs 检查进行评估。
平均年龄约为 43 岁；在正常听力耳中，29.4%的患者总和电位/动作电位异常。在耳聋耳中，依次观察到 32.4%、17.6%和 50%的病例出现 VEMPs 结果缺失、正常和异常，在正常听力耳中，分别观察到 23.5%、50%和 26.5%的结果缺失、正常和异常。在正常听力耳中，异常 VEMPs 的分布为 26.5%，而在耳聋耳中，对侧耳异常的比例为 50%（p 值=0.00021）。在 VNG 检查中，在正常听力耳的患者中，结果依次为正常和功能低下的分别有 27 和 7 例。
当对侧耳聋的 VEMPs 结果正常时，正常听力耳的 VNG 测试出现功能低下的可能性更大。在正常听力耳的患者中，尽管对侧耳聋的 VEMPs 分布异常更大，但对侧耳聋的 VEMPs 也可能出现异常。在进行消融手术之前，应首先评估耳聋侧以及正常听力侧。
