Akif Gunes1, Elif Karali1, Ahmet Ural1, Fatih Ruzgar2. 1. Faculty of Medicine, Department of Otorhinolaryngology, Bolu Abant Izzet Baysal University, Bolu, Turkey. 2. Faculty of Medicine, Department of Audiology, Bolu Abant Izzet Baysal University, Bolu, Turkey.
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.
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.