Kimura Mitsuhiro, Hamamura Ryouji, Umehara Tsuyoshi, Aoi Noriaki, Sano Chiaki, Kataoka Shingo, Kawauchi Hideyuki
Department of Otorhinolaryngology, Shimane University, Faculty of Medicine, Izumo.
Nihon Jibiinkoka Gakkai Kaiho. 2009 Aug;112(8):615-22. doi: 10.3950/jibiinkoka.112.615.
Acute low-tone sensorineural hearing loss (ALHL) is generally has a relatively good prognosis. We have often found in long-term following-up, however, that ALHL relapses, recurs or develops into Meniere's disease. Diagnostic criteria of the Acute Altitude Deafness Research Group of the Ministry of Health, Labor, and Welfare of Japan, define ALHL as low-tone-disorder sensorineural hearing loss without vertigo in which cochlear symptoms -ear fullness, tinnitus, and deafness- develop suddenly. Over the last five years, we have treated 31 cases of ALHL, in about half of which neurotological examination showed potential peripheral vestibular dysfunction on testing positional nystagmus (a) with closed eyes and (b) in a dark room with open eyes, and by finding laterality in the peripheral labyrinth system on caloric test. These cases show high canal paresis -a maximum slow- phase eye velocity of caloric nystagmus exceeding 60%. These results, taken together, suggest that derangement extends to the peripheral labyrinth system in patients with ALHL.
急性低频感音神经性听力损失（ALHL）通常预后相对较好。然而，我们在长期随访中经常发现，ALHL会复发、再度发作或发展成梅尼埃病。日本厚生劳动省急性高原性耳聋研究组的诊断标准将ALHL定义为无眩晕的低频紊乱性感音神经性听力损失，其中耳蜗症状（耳闷、耳鸣和耳聋）突然出现。在过去五年中，我们治疗了31例ALHL患者，其中约一半患者在进行神经耳科学检查时，通过（a）闭眼和（b）在暗室睁眼测试位置性眼球震颤，以及通过在冷热试验中发现外周迷路系统的偏向性，显示出潜在的外周前庭功能障碍。这些病例显示出高半规管轻瘫——冷热性眼球震颤的最大慢相眼速度超过60%。综合这些结果表明，ALHL患者的紊乱扩展至外周迷路系统。
