Yamasoba T, Kikuchi S, Higo R, O'uchi T, Tokumaru A
Department of Otolaryngology, University of Tokyo, Japan.
Ann Otol Rhinol Laryngol. 1993 Nov;102(11):873-7. doi: 10.1177/000348949310201110.
To determine the characteristics of sudden deafness associated with slow blood flow (SBF) within the vertebrobasilar arteries, we evaluated 57 patients with sudden deafness using magnetic resonance imaging (MRI). We detected SBF in 12 (21%) patients, predominantly men over 50 years of age. A second MRI performed in 5 patients 2 months after the onset of symptoms showed recovery of blood flow. All 12 patients complained of vertigo. Audiological and neurotologic tests suggested that hearing loss mainly involved the inner ear. Our findings suggest that unless central lesions are detected, headache, hypoesthesia of the external ear canal, and electronystagmographic abnormalities are signs of SBF. Because sudden deafness may recur in patients who have SBF, they should be monitored and treated to prevent recurrence.
为了确定与椎基底动脉血流缓慢（SBF）相关的突发性聋的特征，我们使用磁共振成像（MRI）对57例突发性聋患者进行了评估。我们在12例（21%）患者中检测到了血流缓慢，这些患者主要是50岁以上的男性。症状发作2个月后对5例患者进行的第二次MRI检查显示血流恢复。所有12例患者均主诉眩晕。听力学和神经耳科学检查表明，听力损失主要累及内耳。我们的研究结果表明，除非检测到中枢性病变，头痛、外耳道感觉减退和眼震电图异常是血流缓慢的体征。由于血流缓慢的患者可能会复发突发性聋，因此应对他们进行监测和治疗以预防复发。
