Comparative Study of the Sinusoidadal Harmonic Acceleration Test andthe Caloric Test in Peripheral Vestibular Disorders / 대한이비인후과학회지

ABSTRACT

BACKGROUND AND OBJECTIVES: The shinusoidal harmonic acceleration (SHA) test is known to be useful for differentiating peripheral and central disorders and monitoring the progress of vestibular diseases. However, it is not fully known how SHA test results correlate with the degree of caloric response, which have been widely used and accepted as a standard test in evaluating vestibular functions. This study was designed to investigate the relationship between SHA test and caloric test in an attempt to further elucidate the clinical significance of SHA test. MATERIALS AND METHODS: Fifty-four patients who were diagnosed with peripheral vestibular disorder at Asan Medical Center participated in this study. All patients underwent caloric tests and SHA tests. The results of both tests were compared. RESULTS: The present study reveals that the results of the SHA test in peripheral vestibular disorder are correlated with those of the caloric test, that is, patients with unilateral canal paresis in the caloric test also tend to show phase leads at lower frequency and low response gain in the SHA test. CONCLUSION: This study could be used as a basis for further studies and for the clinical use of the SHA test.