Clinical Professor, Department of ORL & HNS, Anadolu Medical Center, Kocaeli, Turkey.
Medical Audiologist, Physiotherapist, Department of ORL & HNS, Anadolu Medical Center, Kocaeli, Turkey.
Acta Otolaryngol. 2022 Jan;142(1):43-47. doi: 10.1080/00016489.2021.2018136. Epub 2021 Dec 26.
Pseudo-spontaneous nystagmus (PSN) can be detected in patients with lateral canal benign paroxysmal positional vertigo (LC-BPPV). Its frequency, and correlation with the therapeutic outcome have been less described and conflicting results have been reported.
This study aims to investigate its clinical and prognostic significance.
One hundred and eighty-four patients with LC BPPV (98 apogeotropic, 86 geotropic type) were enrolled for the study. Clinical parameters were reviewed in patients with or without PSN. The Chi-square and one way ANOVA tests were used to compare the difference between study groups. Statistical significance was set at < .05.
Twenty-two patients with apogeotropic (22.4%; 98/22) and 17 patients with geotropic nystagmus (19.7%; 86/17) had PSN. The incidence, age, male-female ratio, mean slow phase velocity (SPV), duration of BPPV and the rate of recurrence were not significant in patients with LC-BPPV whether they have PSN or not.
Prognostic role of PSN in patients with LC BPPV seems to be questionable.
Appearance and disappearance of PSN with regard to head position helps to differentiate BPPV from other acute vestibular disorders. Additionally, direction of nystagmus assists to determine the site of the affected canal. However, prognostic significance is obscure.
外侧半规管良性阵发性位置性眩晕（LC-BPPV）患者可出现假性自发性眼震（PSN）。但其频率及其与治疗效果的相关性描述较少，且报道结果存在冲突。
本研究旨在探讨其临床和预后意义。
共纳入 184 例 LC-BPPV 患者（98 例向地性，86 例离地性）。回顾分析伴有或不伴有 PSN 的患者的临床参数。采用卡方检验和单因素方差分析比较各组间的差异。以 P<0.05 为差异有统计学意义。
22 例向地性（22.4%，98/22）和 17 例离地性眼震（19.7%，86/17）患者存在 PSN。LC-BPPV 患者无论是否存在 PSN，其发生率、年龄、男女比例、慢相速度（SPV）均值、BPPV 持续时间及复发率均无显著差异。
PSN 在 LC-BPPV 患者中的预后作用似乎值得怀疑。
PSN 随头位的出现和消失有助于将 BPPV 与其他急性前庭障碍区分开来。此外，眼震的方向有助于确定受累半规管的位置。但预后意义尚不清楚。
