Okumura T, Takahashi H, Honjo I, Naito Y, Takagi A, Tuji J, Ito J
Department of Otolaryngology, Kobe City General Hospital, Japan.
Acta Otolaryngol Suppl. 1995;520 Pt 2:323-6. doi: 10.3109/00016489509125262.
Four patients (7 ears) with a large vestibular aqueduct (VA) were examined for history of vertigo and vestibular function. Vertigo was observed in all the 4 patients. The caloric responses were significantly poorer in ears with a large VA than in the controls. On a patient with a large VA who had several attacks of sudden hearing loss and vertigo following minor head trauma, long-time exposure to sunshine, common cold, and exercise, vestibular function tests were performed several times; the caloric responses were found to fluctuate and direction changing apogeotropic positional nystagmus was observed. These findings suggest that in patients with a large VA, not only hearing but also the vestibular function are generally impaired. We believe than direct transmission of intracranial pressure changes to the inner ear or subsequent inner ear fluid movement through the large endolymphatic sac and duct have an influence on the cochlea and vestibule.
对4例（7耳）大前庭导水管（VA）患者进行了眩晕病史及前庭功能检查。4例患者均有眩晕症状。大前庭导水管患者耳部的冷热试验反应明显比对照组差。对1例大前庭导水管患者进行了多次前庭功能测试，该患者在轻微头部外伤、长时间日晒、感冒及运动后出现多次突发性听力损失和眩晕发作；发现冷热试验反应波动，并观察到向地性位置性眼震方向改变。这些发现表明，大前庭导水管患者不仅听力，而且前庭功能通常也会受损。我们认为，颅内压变化通过扩大的内淋巴囊和导管直接传递至内耳或随后的内耳液体运动对耳蜗和前庭有影响。
