Yuen K, Fujimoto M, Masuda Y
Department of Otolaryngology, Okayama University Medical School, Japan.
Acta Otolaryngol Suppl. 1995;519:191-2. doi: 10.3109/00016489509121901.
It has been reported that a head-shaking test is very useful in clinical practice. To observe head-shaking nystagmus (HSN) a Frenzel's glass and electronystagmography (ENG) have been used. Although observation with Frenzel's glass is a simple method, it tends to suppress after shaking nystagmus, as gazing is not completely eliminated with Frenzel's glass. An electronystagmogram in darkness can eliminate gazing completely, but it requires much trouble in routine use. We therefore tried to use Frenzel's glass with an infrared CCD camera. We observed highly provoked HSN like ENG in darkness and were able to use it without difficulty. We recognized the second phase in several cases with only an infrared Frenzel's glass and the rotatory component of the nystagmus. This method is more convenient and valuable for clinical use than ENG and Frenzel's glass.
据报道，摇头试验在临床实践中非常有用。为了观察摇头性眼球震颤（HSN），人们使用了弗伦泽尔氏眼镜和眼震电图（ENG）。尽管使用弗伦泽尔氏眼镜观察是一种简单的方法，但它往往会抑制摇头后的眼球震颤，因为使用弗伦泽尔氏眼镜并不能完全消除注视。黑暗中的眼震电图可以完全消除注视，但在常规使用中需要很多麻烦。因此，我们尝试将弗伦泽尔氏眼镜与红外电荷耦合器件（CCD）相机一起使用。我们观察到，在黑暗中，它能像眼震电图一样引发强烈的HSN，并且使用起来毫无困难。我们仅用红外弗伦泽尔氏眼镜在几个病例中识别出了第二阶段以及眼球震颤的旋转成分。这种方法在临床应用中比眼震电图和弗伦泽尔氏眼镜更方便、更有价值。
