Auditory Implants, Cochlear Implant Centre of the Alpes, Department of Oto-Rhino-Laryngology, Head and Neck Surgery, University Hospital Grenoble Alpes, 38700 La Tronche, France; EA 3450 DevAH, Development, Adaptation and Handicap, Faculty of Medicine and UFR STAPS, University of Lorraine, 54600 Villers-lès-Nancy, France.
Department of Otolaryngology H&N surgery, University School of Medicine, Shanghai Ninth People's Hospital, Shanghaï Jiao Tong, 200011 Shanghaï, China.
Eur Ann Otorhinolaryngol Head Neck Dis. 2019 Sep;136(4):263-272. doi: 10.1016/j.anorl.2019.04.008. Epub 2019 Apr 25.
To establish optimum stimulus frequency and location of bone conducted vibration provoking a skull vibration induced nystagmus (SVIN) in superior semi-circular canal dehiscences.
SVIN 3D components in 40 patients with semi-circular canal dehiscence (27 unilateral and 13 bilateral) were compared with a group of 18 patients with severe unilateral vestibular loss and a control group of 11 volunteers.
In unilateral semi-circular canal dehiscences, SVIN torsional and horizontal components observed on vertex location in 88% beat toward the lesion side in 95%, and can be obtained up to 800Hz (around 500Hz being optimal). SVIN slow-phase-velocity was significantly higher on vertex stimulation at 100 and 300Hz (P=0.04) than on mastoids. SVIN vertical component is more often upbeating than downbeating. A SVIN was significantly more often observed in unilateral than bilateral semi-circular-canal dehiscences (P=0.009) and with a higher slow phase velocity (P=0.008). In severe unilateral vestibular lesions the optimal frequency was 100Hz and SVIN beat toward the intact side. The mastoid stimulation was significantly more efficient than vertex stimulation at 60 and 100Hz (P<0.01).
SVIN reveals instantaneously in unilateral semi-circular canal dehiscences a characteristic nystagmus beating, for the torsional and horizontal components, toward the lesion side and with a greater sensitivity toward high frequencies on vertex stimulation. SVIN three components analysis suggests a stimulation of both superior semi-circular canal and utricle. SVIN acts as a vestibular Weber test, assessing a vestibular asymmetrical function and is a useful indicator for unilateral semi-circular canal dehiscence.
确定最佳刺激频率和位置，以引发骨导振动诱发上半规管裂引起的颅骨振动诱发眼球震颤（SVIN）。
将 40 例半规管裂患者（单侧 27 例，双侧 13 例）的 SVIN 3D 成分与 18 例单侧严重前庭损失患者和 11 名志愿者对照组进行比较。
在单侧半规管裂中，在顶点位置观察到的 SVIN 扭转和水平成分在 95%的情况下向病变侧偏转 88%，并且可以达到 800Hz（约 500Hz 最佳）。在顶点刺激时，100Hz 和 300Hz 的 SVIN 慢相速度明显高于乳突（P=0.04）。SVIN 垂直成分向上跳动比向下跳动更常见。单侧半规管裂中的 SVIN 明显比双侧半规管裂更常见（P=0.009），且慢相速度更高（P=0.008）。在单侧严重前庭病变中，最佳频率为 100Hz，SVIN 向未受损侧偏转。在 60Hz 和 100Hz 时，乳突刺激明显比顶点刺激更有效（P<0.01）。
SVIN 可在单侧半规管裂中即刻显示出特征性的眼球震颤，对于扭转和水平成分，向病变侧偏转，并且在顶点刺激时对高频更敏感。SVIN 三个成分分析提示刺激了上半规管和耳石器。SVIN 作为前庭 Weber 测试，评估前庭不对称功能，是单侧半规管裂的有用指标。
