Caloric Irregularity與Caloric Dysrhythmia之鑑別－基礎與臨床上的研究

Differentiation between Caloric Irregularity and Caloric Dysrhythmia - Basic and Clinical Study

楊怡和(Yi-Ho Young) ； 野村恭也(Yasuya Nomura)

《中華民國耳鼻喉科醫學會雜誌》 27卷1期 (1992/03) Pp. 1-6

https://doi.org/10.6286/1992.27.1.1

摘要

Caloric irregularity可見於末梢性前庭病變，如實驗的外淋巴瘻動物與臨床的外淋巴瘻病人。其不同於過去所謂的caloric dysrhythmia，蓋後者可見於中樞性前庭病變的實驗動物與病人中。Caloric irregularity的特微是，單側性溫差眼振不規則反應，眼振的慢速相速度不一，反應期間延長。其病理學的變化，則為「游離迷路」。

關鍵字

外淋巴瘻 ； 游離迷路 ； 慢速相速度

並列摘要

”Caloric dysrhythmi ”, an irregular nystagmic rhythm induced by the caloric test, is quite often present in central vestibular lesions, but is rarely encountered with peripheral vestibular lesions. The mechanism of caloric dysrhythmia is considered to be damage to the cerebello-vestibular interrelation by tumor or degenerative lesions. However, irregular caloric response also occurs in patients and/or animals with perilympy fistula. Sine an irregular pattern in caloric test could be produced in perilymph fistula, that is why we use the term ”caloric irregularity” rather than caloric dysrhythmia, because the former refers to vertigo with peripheral origin.
The term caloric irregularith refers to a gross irregularity in the amplitude and/or frequency of caloric nystagmus, with prolonged duration and inconstant slow phase velocity. Morphological study in animals with caloric irregularity showed partial collapse of the membranous labyrinth, that is ”floating labyrinth”.

並列關鍵字

perilymph fistula ； floating labyrinth ； slow phase velocity