A Preliminary Study on Semicircular Canal Function Assessment by Video Head Impulse Test and Caloric Test
CEN Jintian
ZHANG Shuqi
YUAN Tao
LIANG Yinfei
ZENG Xiangli
Abstract：Objective To investigate characteristics of video head impulse test (vHIT) and caloric test manifesta-tions in common vertigo diseases, and their roles in assessing semicircular canal function. Methods Caloric test and vHIT were conducted in 82 patients with common vertigo diseases, including benign paroxysmal positional vertigo (BP-PV, n=20), Meniere's disease (MD, n=25), vestibular neurolabyrinthitis (VN, n=11), vestibular migraine (VM, n=12) and sudden deafness with vertigo (SD, n=14)). The results of these tests were analyzed and compared. Results For the 82 patients, the rate of abnormal results was 64.6%for caloric test and 72.0%for vHIT, respectively (P=0.307). The rate of abnormal semicircular canal function was 82.9%, with both tests showing abnormal results in 44 patients, normal ca- loric test and abnormal vHIT in 15 patients, and abnormal caloric test but normal vHIT in 9 patients. The rate of abnor-mal vHIT and caloric tests was 56.0%and 60.0%, respectively, for MD (both tests abnormal in 12 patients, normal calor-ic test/abnormal vHIT in 2, and abnormal caloric test/normal vHIT in 3 patients), 85.0%and 65.0%for BPPV (both tests abnormal in 11 patients, normal caloric test/abnormal vHIT in 6, and abnormal caloric test/normal vHIT in 2 patients), 78.6%and 57.1%for SD (both tests abnormal in 8 patients, normal caloric test/abnormal vHIT in 3, and abnormal calor-ic test/normal vHIT in none), 50.0%and 66.7%for VM (both tests abnormal in 4 patients, normal caloric test/abnormal vHIT in 2, and abnormal caloric test/normal vHIT in 4 patients), and 100.0%and 81.8%for VN (both tests abnormal in 9 patients, normal caloric test/abnormal vHIT in 2, and abnormal caloric test/normal vHIT in none), respectively. The rate of abnormal vHIT was different among groups (P=0.015), but not that of caloric test (P=0.732). vHIT showed ab-normal contralateral semicircular canal function in 6 MD and 7 BPPV patients. Conclusions Combining vHIT and calor-ic test can improve detection of semicircular canal function abnormality, which is useful in comprehensive semicircular canal function assessment. vHIT may also be used to detect contralateral semicircular canal abnormal function in Me-niere's disease and BPPV.
Keywords：Video Head Impluse TestCaloric TestFunction of Semicircular CanalVertigo
Publication Date：2018-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 267-271 )