Normal Values for Cervical Vestibular-Evoked Myogenic Potentials

作者：Blakley Brian W^*; Wong Veronica

来源：Otology & Neurotology, 2015, 36(6): 1069-1073.

DOI：10.1097/MAO.0000000000000752

• Dizziness
• Normal values
• Saccule
• Vestibular-evoked myogenic potentials

Objectives To assess the variability of normal values for cervical vestibular-evoked myogenic potentials (cVEMP) testing and to provide guidance regarding which parameters should be reported for clinical practice.
Study Design Forty-eight normal subjects with no history of hearing loss or vestibular symptoms underwent cVEMP testing. Measurement parameters were tabulated and compared to other sets of cVEMP normal values in the literature. The literature was reviewed to assess the clinical significance of abnormal cVEMP results. The distributions of threshold and symmetry ratios for normal subjects were compared to the distributions of 90 patients who underwent cVEMP testing.
Setting Tertiary academic center.
Results Upper limits of 42% symmetry ratio and the range of 65 to 95 dB HL for threshold were established for our center. The quartile coefficients of dispersion were much less than 1.0 for all cVEMP parameters in the literature, suggesting that the variability in normal ranges across the literature is small. The distributions for threshold and symmetry ratio were similar between normal and patient groups. There is a lack of information in the literature regarding the impairment of function resulting from various degrees of abnormality of VEMP results.
Conclusions Normal values for cVEMP parameters are statistically consistent in the literature. The clinical significance of abnormal values has not been validated. For clinical purposes, cVEMP thresholds should be reported. Reporting of other parameters is optional.

• 出版日期2015-7