title: [The significance of directional preponderance in the evaluation of vestibular function in patients with vertigo].
abstract: Objective:To analyze the relationship between directional preponderance (DP), spontaneous nystagmus(SN) and vestibular disorders, and to investigate the significance of DP in directing peripheral vestibular function in patients with vertigo.Methods:This was a retrospective analysis of 394 cases diagnosed with peripheral vestibular disease accompanied by vertigo from March 2012 to June 2014 in the Outpatient Department of the Eye & ENT Hospital of Fudan University. Results of static and dynamic posture equilibrium tests, SN, unilateral weakness(UW), and DP in videonystagmography(VNG) were analyzed and compared.Results:The mean interval time between the last vertigo attack and examination in patients with SN or DP in caloric test were 4.4 d and 7.3 d respectively, and those without SN or DP were 18.3 d and 17.5 d respectively. The patients were divided into two groups according to DP results of caloric test. DP-normal group had 203 cases and DP-abnormal group had 191 cases. Spontaneous nystagmus was presented in 44 cases in the DP-normal group (21.67%) and four in the DP-abnormal group (2.09%). A significant difference was found between the two groups (χ2=35.27,P=0.000). Deficiency of vestibular function was noted in 165 cases in the DP-normal group (81.28%) and 123 (64.40%) in the DP-abnormal group in static and dynamic posture equilibrium tests. The difference between the two groups was statistically significant (χ2=14.26,P=0.000).Conclusion:Compared with DP-normal patients, DP-abnormal patients are more likely to have spontaneous nystagmus and balance disorders due to vestibular dysfunction.
authors.affiliation: Department of Otorhinolaryngology, Eye & ENT Hospital of Fudan University, Shanghai 200031, China.
authors.forename: J
authors.initials: J
authors.lastname: Wang
authors.affiliation: Department of Otorhinolaryngology, Eye & ENT Hospital of Fudan University, Shanghai 200031, China.
authors.forename: Y J
authors.initials: YJ
authors.lastname: Zhou
authors.affiliation: Department of Otorhinolaryngology, Eye & ENT Hospital of Fudan University, Shanghai 200031, China.
authors.forename: J
authors.initials: J
authors.lastname: Yu
authors.affiliation: Department of Otorhinolaryngology, Eye & ENT Hospital of Fudan University, Shanghai 200031, China.
authors.forename: J
authors.initials: J
authors.lastname: Gu
mesh_terms: D002150:Caloric Tests; D005260:Female; D006801:Humans; D008297:Male; D009759:Nystagmus, Pathologic / Q000503:physiopathology; D004856:Postural Balance / Q000502:physiology; D012189:Retrospective Studies; D013997:Time Factors; D014717:Vertigo / Q000145:classification / Q000503:physiopathology*; D015837:Vestibular Diseases / Q000503:physiopathology; D014724:Vestibular Function Tests; D014722:Vestibule, Labyrinth / Q000503:physiopathology*
keywords: Caloric tests; Electronystagmography; Vertigo; Vestibular function tests