Clinical efficacy analysis of repositioning for posterior semicircular canalithiasis
10.3969/j.issn.1671-8348.2025.11.024
- VernacularTitle:后半规管管石症复位的临床疗效分析
- Author:
Linyan ZHANG
1
;
Chaoyong WANG
;
Yan TANG
;
Wenlong LUO
Author Information
1. 重庆大学附属涪陵医院耳鼻咽喉头颈外科,重庆 408000
- Keywords:
vertigo;
posterior semicircular canal;
nystagmus;
repositioning;
efficacy
- From:
Chongqing Medicine
2025;54(11):2621-2625
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the parameter characteristics of three-dimensional nystagmus during repositioning in patients with posterior semicircular canal canalolithiasis(PSC-Can)and its clinical efficacy.Methods Clinical data were collected from 76 PSC-Can patients who underwent Epley repositioning assisted by three-dimensional video nystagmography.According to the presence or absence of nystagmus during repo-sitioning,patients were divided into Group A(with positive nystagmus,n=25),Group B(without nystag-mus,n=35),and Group C(with reverse nystagmus,n=16).The study analyzed the parameters of nystagmus occurring during repositioning and the nystagmus in the first position,as well as the efficacy of repositioning across the three groups.Results The differences in maximum slow-phase velocity of horizontal component nystagmus,vertical component nystagmus,and torsional component nystagmus in the primary position were statistically significant(P<0.05).The maximum slow-phase velocity of the vertical component in the left PSC-Can was greater than that in the right PSC-Can,with a statistically significant difference(P<0.05).A-mong the three groups,the differences in duration and maximum slow-phase velocity of the vertical and tor-sional components were statistically significant(P<0.05).In groups A and C,the maximum slow-phase ve-locity of torsional component nystagmus in the primary position was greater than that during the repositioning process.The cure rate was highest in group A,followed by group B,and lowest in group C,with statistically significant differences(P<0.05).Conclusion In patients with posterior semicircular canal canalolithiasis(PSC-Can),in the right-beating nystagmus group,nystagmus is strong and short-lived with optimal repositioning efficacy;in the left-beating nystagmus group,nystagmus is weak and prolonged with poor repositioning efficacy.
