Li Yangyang, Liu Rizhao, Zheng Jinquan, Nie Guohui
Department of Otolaryngology Head and Neck Surgery，Shenzhen Second People's Hospital，Shenzhen，518000，China.
Lin Chuang Er Bi Yan Hou Tou Jing Wai Ke Za Zhi. 2021 Sep;35(9):821-824. doi: 10.13201/j.issn.2096-7993.2021.09.011.
By observing the nystagmus forms at different positions during Epley reduction in patients with posterior semicircular canal benign parochial positional vertigo（PC-BPPV）, to compare the effects of the first reduction, and to further summarize the possible causes of reduction failure and the prognosis of patients with different nystagmus forms. A retrospective analysis of 191 PC-BPPV patients diagnosed with PC-BPPV showed that 95 cases had positive nystagmus during the reduction process（group A）, 69 cases had no nystagmus （group B）, and 27 cases had reverse nystagmus （group C）. All the patients were diagnosed by G-Force BPPV and were treated through simulative Epley CRP. The form of nystagmus and the effect of the first reduction were compared. The first reduction effect of group A was better than that of group C（<0.05）. The reduction effect of group B was better than that of group C（<0.05）. There was no significant difference in the reduction effect between group A and group B（>0.05）. The form of nystagmus in the reduction process of PC-BPPV has a certain guiding significance for the evaluation of the first reduction effect and the successful reduction. The reverse nystagmus during the reduction process indicates a poor reduction effect.
通过观察后半规管良性阵发性位置性眩晕（PC-BPPV）患者在Epley复位过程中不同位置的眼震形式，比较首次复位的效果，并进一步总结复位失败的可能原因及不同眼震形式患者的预后。对191例诊断为PC-BPPV的患者进行回顾性分析，结果显示95例患者在复位过程中出现正向眼震（A组），69例患者无眼震（B组），27例患者出现反向眼震（C组）。所有患者均经G-Force BPPV诊断，并通过模拟Epley CRP进行治疗。比较眼震形式及首次复位效果。A组首次复位效果优于C组（<0.05）。B组复位效果优于C组（<0.05）。A组与B组复位效果差异无统计学意义（>0.05）。PC-BPPV复位过程中的眼震形式对首次复位效果及复位成功与否的评估具有一定指导意义。复位过程中出现反向眼震提示复位效果不佳。
