Psillas George, Petrou Ioanna, Printza Athanasia, Sfakianaki Ioanna, Binos Paris, Anastasiadou Sofia, Constantinidis Jiannis
1st Otolaryngology Department, School of Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, AHEPA Hospital, Stilponos Kyriakidi St., 546 36 Thessaloniki, Greece.
Department of Rehabilitation Sciences, Cyprus University of Technology, Limassol 3036, Cyprus.
J Clin Med. 2022 Jun 16;11(12):3467. doi: 10.3390/jcm11123467.
The aim of this study was to evaluate gain and refixation saccades (covert and overt) using a video head impulse test (vHIT) in the horizontal and vertical planes in patients after the onset of unilateral acute vestibular neuritis (AVN). Thirty-five patients were examined in the acute stage of AVN and at follow-up (range, 6-30 months); a control group of 32 healthy subjects also participated. At onset, the mean gain was significantly lower on the affected side in all of the semi-circular canal planes, mainly in the horizontal canal plane, and saccades (covert and overt) were more prevalent in the horizontal compared to the vertical canal planes. Multi-canal affection occurred more frequently (80% for gain, 71% for saccades) than isolated canal affection. At follow-up, which ranged from 6 to 30 months, the gain was recovered in all of the canals (anterior in 50%, horizontal in 42.8%, and posterior canal in 41.1% of cases), while covert and overt saccades were reduced in the horizontal and vertical planes. However, covert saccades were still recorded in a greater proportion (69%) than overt saccades (57%) in the horizontal plane and at a lower rate in the vertical planes. The compensatory mechanisms after AVN mainly involve the horizontal canal, as the refixation saccades-especially covert ones-were more frequently recorded in the horizontal than vertical canals.
本研究的目的是使用视频头脉冲试验（vHIT）评估单侧急性前庭神经炎（AVN）发作后患者在水平和垂直平面上的增益和重新注视扫视（隐蔽性和显性）。对35例AVN急性期患者及随访期（6 - 30个月）患者进行了检查；32名健康受试者组成的对照组也参与其中。发病时，患侧在所有半规管平面上的平均增益均显著降低，主要是在水平半规管平面，并且与垂直半规管平面相比，水平半规管平面上的扫视（隐蔽性和显性）更为普遍。多管受累比单管受累更常见（增益方面为80%，扫视方面为71%）。在6至30个月的随访中，所有半规管的增益均恢复（前半规管恢复的病例占50%，水平半规管占42.8%，后半规管占41.1%），而水平和垂直平面上的隐蔽性和显性扫视均减少。然而，在水平平面上，隐蔽性扫视的记录比例（69%）仍高于显性扫视（57%），在垂直平面上的记录比例较低。AVN后的代偿机制主要涉及水平半规管，因为重新注视扫视——尤其是隐蔽性扫视——在水平半规管中的记录频率高于垂直半规管。
