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English Abstract
Journal Article
[Discussion and analysis the value of supine median³ nystagmus in the diagnosis and treatment of HC-BPPV].
Objective: To explore the clinical value of supine median³ nystagmus in the accurate diagnosis of horizontal semicircular canal benign paroxysmal positional vertigo(HC-BPPV). Methods: A total of 187 patients with HC-BPPV admitted to the First Affiliated Hospital of Xi'an Jiaotong University from June 2020 to March 2021 were selected. Among them 42 cases of Cupulolithiasis and 145 cases of Canalithiasis. The nystagmus parameters of patients left and right supine position and supine median³ position were recorded in detail by RART. According to the direction of supine median³ nystagmus, patients were divided into three groups: group A(nystagmus to weak side), group B(nystagmus to strong side), group C(negative nystagmus). The canalith repositioning manoeuvres(CRM) was carried out by utility of an automatic vestibular function diagnosis and therapy system(SRM-IV). The cure rate of CRM in three groups of HC-BPPV patients was compared, Multivariate logistic regression analysis was performed to analyze the influencing factors of CRM for HC-BPPV. Results: The cure rates of group A, group B and group C were 81.58%, 16.13% and 56.25%, respectively. The difference among the three groups was statistically significant. Then a pairwise comparison of group A, B and C, the difference was statistically significant(χ²A-B=40.294, P <0.001,χ²B-C=14.528, P <0.001,χ²A-C=11.606, P =0.001); the results of multivariate logistic regression analysis showed that the direction of supine median³ nystagmus and BMI were the influencing factors of CRM for HC-BPPV. Conclusion: The direction, intensity and duration of supine median³ nystagmus play an important role in determining the responsibility semicircular canal of HC-BPPV.
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