Inukai Kenya, Koizuka Izumi, Takahashi Sugata
Department of Otolaryngology, Niigata University, Faculty of Medicine, 1-757 Asahimachi-dori, Niigata 951-8510, Japan.
Auris Nasus Larynx. 2008 Mar;35(1):31-5. doi: 10.1016/j.anl.2007.06.007. Epub 2007 Sep 10.
One of the pathologic conditions underlying benign paroxysmal positional vertigo (BPPV) is degeneration of the otolith organs. In this study, we examined changes in the parameters of stabilometry under an upright condition and head-tilt conditions in patients with BPPV.
We performed stabilometry on 21 patients with right BPPV, on 21 patients with left BPPV and on 21 controls. First, the subject stood barefoot in an upright position with both feet together on the platform with eyes closed. Next, tilting of the head about 30 degrees to the left was added. Then, tilting about 30 degrees to the right was performed.
In right BPPV patients, the total length of velocity vectors in the right or left direction on right or left head-tilt were significantly smaller than those in an upright position. The enveloped area and total length of velocity vectors in the right or left direction were significantly larger than those in controls. In left BPPV patients, there were no parameters that showed any significant difference.
In this study, lesions of right BPPV patients were coincidentally more severe than those in left BPPV patients, and velocity vectors with head-tilts were significantly smaller than in an upright position. Using the total length of the velocity vectors, head-tilting stabilometry has the potential to become a reliable otolith function examination method.
良性阵发性位置性眩晕（BPPV）的病理基础之一是耳石器官退变。在本研究中，我们检测了BPPV患者在直立位和头部倾斜位时姿势稳定参数的变化。
我们对21例右侧BPPV患者、21例左侧BPPV患者和21例对照者进行了姿势稳定检测。首先，受试者赤脚站立于平台上，双脚并拢，双眼闭合。接着，头部向左倾斜约30度。然后，头部再向右倾斜约30度。
在右侧BPPV患者中，头部向左或向右倾斜时，左右方向速度矢量的总长度显著小于直立位时。速度矢量的包络面积和左右方向的总长度显著大于对照组。在左侧BPPV患者中，未发现有任何参数显示出显著差异。
在本研究中，右侧BPPV患者的病变巧合地比左侧BPPV患者更严重，且头部倾斜时的速度矢量显著小于直立位时。利用速度矢量的总长度，头部倾斜姿势稳定检测有可能成为一种可靠的耳石功能检测方法。
