Evaluation of cervical vestibular evoked myogenic potential measures using different stimulus types in patients with posterior canal benign paroxysmal positional vertigo

Abstract

Background: Cervical Vestibular Evoked Myogenic Potential (cVEMP) measurements still do not have standard normative values in posterior canal benign paroxysmal positional vertigo (BPPV).

Aim/Objectives: We aimed to compare cVEMP recordings obtained with different stimuli applied in two different intensities in posterior canal BPPV patients.

Methods: Thirty-four patients with unilateral posterior canal BPPV were included in the patient group. In cVEMP recordings obtained with different stimulus intensity [95 dB HL and 105 dB HL] and different stimuli[tone-burst cVEMP (T-cVEMP) and click cVEMP (C-cVEMP)].

Results: When the C-cVEMP and T-cVEMP findings were compared in the patient group, differences were observed only in peak-to-peak p1-n1 amplitude values in the measurements performed with 95 dB stimulus. However, T-cVEMP measurements performed with 105 dB stimulus showed that both p1 and n1 latency values ​were longer and peak-to-peak p1-n1 amplitude values ​were higher than C-cVEMP measurements.

Conclusions and significance: We recommend using priorly tone-burst stimulus for measurements with 105 dB HL in cVEMP evaluations we will perform in posterior BPPV patients. Both stimulants can be used when 95 dB HL stimuli is used.

Chinese abstract

背景：颈椎前庭诱发肌源性电位（cVEMP）测量对于后半规管良性阵发性位置性眩晕（BPPV）仍没有标准的规范值。

目的：比较两种不同强度刺激对后半规管BPPV患者的cVEMP记录。

方法：病例组包括34例单侧后半规管良性前列腺增生患者。在不同刺激强度[95db-HL和105db-HL] 和不同刺激条件下 [音调突发cVEMP（T-cVEMP）并单击cVEMP（C-cVEMP）] 获得cVEMP记录。

结果：在比较患者组的C-cVEMP和T-cVEMP结果时, 在95db刺激下测量的p1-n1波幅值仅在峰间存在差异。然而, 在105dB刺激下进行的T-cVEMP测量显示p1和n1潜伏期值都比C-cVEMP测量长, p1-n1峰间振幅值也高于C-cVEMP测量。

结论和意义：我们建议在评估后BPPV患者的cVEMP时, 使用优先的音调爆发刺激进行105dBHL的测量。当使用95dB的HL刺激时, 两种刺激物都可以使用。

Keywords:

• VEMP
• benign paroxysmal positional vertigo
• click
• tone-burst

Disclosure statement

We have no conflicts of interest.