Furman J M, Kamerer D B
Department of Otolaryngology, Eye & Ear Hospital of Pittsburgh, University of Pittsburgh School of Medicine, PA 15213.
Acta Otolaryngol. 1989 Nov-Dec;108(5-6):355-61. doi: 10.3109/00016488909125539.
Caloric irrigation and earth vertical axis rotation, both horizontal semicircular canal stimuli, occasionally provide conflicting information about the presence of bilateral vestibular loss. The caloric and rotational responses of an unselected group of 1274 dizzy patients were compared to identify discrepancies between the two tests. Results indicated a poor correlation between the magnitude of response to caloric and rotational stimuli; about half of patients with reduced caloric responses (total eye speed less than or equal to 10 degrees per second) had rotational response magnitudes (at 0.05 Hz and above) that were within normal limits. Our findings confirm that bilateral caloric reduction is not sufficient evidence for diagnosing bilateral vestibular loss and indicate that, in some case, caloric responses may be absent despite apparent normal vestibular sensitivity as assessed by rotational testing.
冷热试验灌注和地球垂直轴旋转，这两种水平半规管刺激方式，偶尔会在双侧前庭功能丧失的判定上给出相互矛盾的信息。对1274名未经挑选的头晕患者的冷热试验和旋转试验反应进行比较，以找出这两种测试之间的差异。结果表明，对冷热刺激和旋转刺激的反应强度之间相关性较差；约一半冷热试验反应减弱（总眼速小于或等于每秒10度）的患者，其旋转试验反应强度（在0.05赫兹及以上）处于正常范围内。我们的研究结果证实，双侧冷热试验反应减弱不足以作为诊断双侧前庭功能丧失的证据，并且表明，在某些情况下，尽管通过旋转试验评估显示前庭敏感性看似正常，但冷热试验反应可能缺失。
