Lempert T, Tiel-Wilck K
Neurologische Abteilung, Klinikum Rudolf Virchow, Berlin, Germany.
Laryngoscope. 1996 Apr;106(4):476-8. doi: 10.1097/00005537-199604000-00015.
Horizontal-canal benign positional vertigo (HC-BPV) is characterized by brief attacks of intense vertigo that are induced by mainly rolling over in bed. Examination shows a burst of purely horizontal nystagmus beating toward the undermost ear when the head is turned from supine to either lateral position. Two patients with typical HC-BPV were treated by a new positional procedure that aims to clear particles from the affected canal. The maneuver starts with the patient in the supine position and consists of three 90-degree head rotations toward the unaffected ear. Both patients had immediate and sustained relief of their attacks. No positional nystagmus could be elicited after the maneuver. The rapid cessation of positional vertigo and nystagmus adds evidence that HC-BPV is caused by dense particles that move within the canal whenever its orientation toward gravity is changed.
水平半规管良性阵发性位置性眩晕（HC - BPV）的特征是主要在床上翻身时诱发的短暂强烈眩晕发作。检查显示，当头部从仰卧位转向任一外侧位时，会出现一阵纯粹向最低位耳朵方向跳动的水平眼震。两名典型HC - BPV患者接受了一种旨在清除患侧半规管内颗粒的新的位置性操作治疗。该操作开始时患者处于仰卧位，包括向未受影响的耳朵方向进行三次90度的头部旋转。两名患者的眩晕发作均立即且持续缓解。操作后未引出位置性眼震。位置性眩晕和眼震的迅速停止进一步证明，HC - BPV是由每当半规管相对于重力的方向改变时在管内移动的致密颗粒引起的。
