Performance of video head impulse test in patients with bilateral vestibular weakness in the caloric test
HU Jiajia
WANG Cuicui
TONG Jiabao
GONG Fengyuan
JIN Zhanguo
JIA Hongbo
Abstract：Objective To analyze the data on the video head impulse test(vHIT)in patients diagnosed with bilateral vestibular weakness(BVW)via the caloric test in order to explore the alternative role of vHIT in diagnosis of BVW.Methods Data on vestibular examination of 106 vertigo patients was retrospectively collected.The patients were divided into the BVW group and normal vestibular function group(control group)according to the caloric test results.Results of vHIT were compared between the two groups.Results Once either unilateral or bilateral anomalies in the horizontal semicircular canals were deemed positive in a vHIT,statistically significant differences could be observed between vHIT and the caloric test for detecting BVW(P=0.002).Furthermore,when only bilateral anomalies in the horizontal semicircular canals were considered positive,but negative in normal canals,vHIT still remained significantly different from the caloric test in identifying BVW(P=0.019).The area under the ROC curve for saccade frequency was 0.748,the sensitivity 60.3%and specificity 87.3%.As for the semicircular canal gain loss,the area under curve was 0.841,sensitivity 87.2%and specificity 76.1%,compared with 0.706,87.2%and 43.3%for asymmetrical gain.Conclusion vHIT should be prioritized as an initial screening tool for diagnosing BVW.When vHIT results show no abnormalities,a caloric test should be conducted to confirm the diagnosis,thereby ensuring that no potential BVW cases are missed.
Keywords：Vestibular weaknessVideo head impulse testCaloric test
Publication Date：2025-02-24
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )