Jeffery Hanna, Hopkins Matthew, Anderson Rebecca, Patel Vignapti, Rogers Jennifer
a Royal Gwent Hospital , Newport , UK and.
b Glan Clwyd Hospital , Rhyl , UK.
Int J Audiol. 2017 Dec;56(12):958-966. doi: 10.1080/14992027.2017.1357841. Epub 2017 Sep 1.
To review the current criteria for the interpretation of positional nystagmus (PN).
Videonystagmography data on PN was collected for 90 patients presenting for balance testing with a history of vertigo or imbalance (excluding those diagnosed with benign paroxysmal positional vertigo). These were compared to normative data from 90 asymptomatic subjects. A literature review was carried out regarding threshold criteria for clinically significant PN. These were evaluated using the data collected.
Clinic group: 90 patients; 37 male, 53 female. Age range 15-82 years. Normative group: Ninety subjects; 31 male, 59 female. Age range 21-79 years.
PN was seen in 75.6% of the clinic group and in 50% of the normative group. The prevalence of nystagmus of slow phase velocity (SPV) > 3°/s was significantly higher in the clinic group than the normative group. The maximum SPV recorded in each position was greater from the clinic group than the normative group.
This study supports the use of normative thresholds for SPV for both horizontal and vertical PN. A normative threshold of >3°/s for horizontal and >7°/s for vertical nystagmus is proposed.
回顾当前用于解释位置性眼球震颤（PN）的标准。
收集了90例有眩晕或失衡病史（排除诊断为良性阵发性位置性眩晕者）前来进行平衡测试的患者的PN视频眼震图数据。将这些数据与90名无症状受试者的正常数据进行比较。对临床上显著PN的阈值标准进行了文献综述。使用收集到的数据对这些标准进行了评估。
临床组：90例患者；男性37例，女性53例。年龄范围15 - 82岁。正常组：90名受试者；男性31名，女性59名。年龄范围21 - 79岁。
临床组中75.6%出现PN，正常组中50%出现PN。临床组中慢相速度（SPV）>3°/秒的眼球震颤患病率显著高于正常组。临床组在每个位置记录到的最大SPV均高于正常组。
本研究支持对水平和垂直PN均使用SPV的正常阈值。建议水平眼球震颤的正常阈值>3°/秒，垂直眼球震颤的正常阈值>7°/秒。
