■位置性眩晕和眼球震颤是头晕的主要症状和体征,分别。尽管仰卧滚动测试(SRT)和零点(NP)在诊断光杯中具有临床实用性,一种位置性眩晕,关于基于各种眼球震颤特征和SRT中方向变化位置性眼球震颤(DCPN)的强度对侧向值进行综合评估的文献存在显着差距,特别是与NP相比。此外,关于轻度杯具患者异常管麻痹(CP)的有限数据强调,需要对更多患者人群进行进一步研究,以阐明这一机制.本研究旨在探讨位置性眼球震颤的特征和水平半规管(HSCC)光杯的偏侧化,这是一种对位置性眩晕和眼球震颤知之甚少的类型。
■85名患者(17名男性,68名女性;平均年龄,60.9年)用浅杯进行了回顾。我们总结了自发性眼震和位置性眼震的特点,包括仰卧位眼震,弓眼球震颤,和瘦眼球震颤。然后,NP的一侧被确定为受影响的一侧,以及自发性眼球震颤的快速相位方向的值,仰卧位眼球震颤,弓眼球震颤,和瘦眼球震颤,以及SRT中DCPN的强度,用于诊断受影响的方面。还对一些患者进行了热量测试。
■在5.7%的位置性眼震颤患者中观察到轻度杯状。仰卧位眼球震颤的频率(88.2%),弓眼震颤(90.6%),瘦眼震(83.5%)高于自发性眼震(61.2%)(p<0.001)。第二NP(NP2)(92.9%)和第三NP(NP3)(83.5%)易于检测,影响了38和47名患者的左右两侧,分别。弓性眼球震颤和瘦性眼球震颤的快速相位方向的横向分布与NP没有显着差异(均p>0.05)。然而,通过SRT中DCPN较剧烈的侧面的侧向化准确率为63.5%,显著低于通过NP(p<0.001)。尤其是仰卧位眼震患者(n=75),该比率仅为58.7%(p<0.001)。然而,无仰卧位眼震患者的发生率为100%(n=10)。在接受热量测试的70名患者中,37例CP异常,在83.8%的患者中,热量反应减少的一侧与轻杯的患侧同侧。
■除了利用NP来确定受影响的一侧,弓眼震颤或瘦眼震的快速相位方向也可以帮助识别。然而,SRT中DCPN强度的简单比较不能提供准确的偏侧化,尤其是仰卧位眼球震颤患者。在光杯的受影响侧,CP的发生率很高。
UNASSIGNED: Positional vertigo and nystagmus are the main symptoms and signs of dizziness, respectively. Despite the clinical utility of the supine roll test (SRT) and null point (NP) in diagnosing light cupula, a type of positional vertigo, there exists a notable gap in the literature concerning the comprehensive evaluation of lateralization values based on various nystagmus characteristics and the intensity of direction-changing positional nystagmus (DCPN) in the SRT, particularly in comparison to the NP. Additionally, limited data on abnormal canal paresis (CP) in light cupula patients underscores the need for further research with a larger patient population to elucidate this mechanism. This study aims to investigate the characteristics of positional nystagmus and lateralization of the horizontal semicircular canal (HSCC) light cupula, which is a type of positional vertigo and nystagmus that is poorly understood.
UNASSIGNED: Eighty-five patients (17 males, 68 females; mean age, 60.9 years) with light cupula were reviewed. We summarized the characteristics of spontaneous nystagmus and positional nystagmus, including supine positioning nystagmus, bow nystagmus, and lean nystagmus. Then, the side of the NP was identified as the affected side, and the values of the fast phase direction of the spontaneous nystagmus, supine positioning nystagmus, bow nystagmus, and lean nystagmus, as well as the intensity of the DCPN in the SRT, were used to diagnose the affected sides. Caloric testing was also performed for some patients.
UNASSIGNED: Light cupula was observed in 5.7% of the patients with positional nystagmus. The frequencies of supine positioning nystagmus (88.2%), bow nystagmus (90.6%), and lean nystagmus (83.5%) were higher than spontaneous nystagmus (61.2%) (p < 0.001). The second NP (NP2) (92.9%) and third NP (NP3) (83.5%) were readily detected, affecting the left and right sides in 38 and 47 patients, respectively. Lateralization through the fast phase directions of bow nystagmus and lean nystagmus did not significantly differ from that of NP (all p > 0.05). However, the accuracy rate of lateralization through the sides with more vigorous DCPN in the SRT was 63.5%, significantly lower than through NP (p < 0.001). Particularly in patients with supine positioning nystagmus (n = 75), the rate was only 58.7% (p < 0.001). However, the rate was 100% in patients without supine positioning nystagmus (n = 10). Among the 70 patients who underwent caloric testing, 37 had abnormal CP, and the sides of the reduced caloric reaction were ipsilateral to the affected sides of the light cupula in 83.8% of the patients.
UNASSIGNED: Besides utilizing the NP to determine the affected side, the fast phase direction of the bow nystagmus or lean nystagmus can also aid in identification. However, a simple comparison of the intensity of DCPN in SRT cannot provide accurate lateralization, especially in patients with supine positioning nystagmus. There is a high incidence of CP on the affected side of the light cupula.