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  • Title: [The value of lean nystagmus and sitting to supine positioning nystagmus in the diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo].
    Author: Wu F, Xing YZ, Bi W, Liu JX.
    Journal: Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi; 2019 Feb 05; 33(2):106-109. PubMed ID: 30808132.
    Abstract:
    Objective: To explore the value of 1ean nystagmus and sitting to supine positioning nystagmus in the diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo. Method: One hundred cases of patients with definitive diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo were tested by 1ean nystagmus and sitting to supine positioning nystagmus and supine roll test. The affected side was recorded according to the nystagmus direction. After diagnosis, they were treated with canalith repositioning procedure. The canalith repositioning procedure was made according to the supine roll test result when 1ean nystagmus and sitting to supine positioning nystagmuscannot be induced. Furthermore，the canalith repositioning procedure was made according to the1ean nystagmus and sitting to supine positioning nystagmuswhenthe supine roll test cannot diagnose. The patients with canalolithiasis were randomly divided into two groups when both 1ean nystagmus and sitting to supine positioning nystagmusand the supine roll test can be induced. One group was treated with canalith repositioning procedure based on results of supine roll test and the other group was treated based on the results of1ean nystagmus and sitting to supine positioning nystagmus. The detection rate and diagnostic coincidence rate of 1ean nystagmus and sitting to supine positioning nystagmus were calculated and the shortterm outcome were evaluated one day after treatment. Result: The detection rate of 1ean nystagmus and sitting to supine positioning nystagmus was 83% and the coincidence rate with the roll test was 90.1%，respectively. There was no significant statistical difference between the treatment effect according to lean nystagmus and sitting to supine positioning nystagmus and supine roll test. Conclusion: Lean nystagmus and sitting to supine positioning nystagmus cannot be used alone in the diagnosis ofhorizontal semicircular canal benign paroxysmal positional vertigo. They need to be combined with supine roll test. However, when the supine roll test is difficult to demonstrate the affected side, it can be used as an auxiliary diagnostic method. When the results of 1ean nystagmus and sitting to supine positioning nystagmusand the supine roll test are inconsistent, repeat the test and conduct a comprehensive assessment to avoid missed diagnosis and misdiagnosis..
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