ATYPICAL REVERSED PAROXYSMAL POSITIONING NYSTAGMUS IN BENIGN PAROXYSMAL POSITIONAL VERTIGO

被引：0
作者：
AGUS, G
PUXEDDU, R
DEMONTIS, GP
PUXEDDU, P
机构：
来源：
ACTA OTO-LARYNGOLOGICA | 1995年
关键词：
REVERSED MYSTAGMUS; DIAGNOSTIC MANEUVERS; CUPULOLITHIASIS; CANALOLITHIASIS;
D O I：
暂无
中图分类号：
R76 [耳鼻咽喉科学];
学科分类号：
100213 ;
摘要：
An atypical paroxysmal positioning nystagmus (PPNy), ''reversed'' in its directional components, is a rare finding in patients suffering from benign paroxysmal positioning vertigo (BPPV). It poses problems of pathophysiogenetic interpretation, differential diagnosis with a CNS lesion and therapeutic strategy. Such a finding was observed in 7 patients (out of a total of 450 BPPV) and took on the typical PPNy pattern after repeated diagnostic manoeuvres. These aspects are incompatible with the ''heavy cupula'' mechanism (cupulolithiasis) and are better explained by the presence of ''free endolymph aggregates'' (canalolithiasis) within the posterior semicircular canal (p.s.c). Moreover, canalolithiasis would also permit a more convincing interpretation of all the clinical findings observed in typical p.s.c.-BPPV.
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页码：143 / 147
页数：5
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