Faculty of Biomedical Engineering, Czech Technical University in Prague, Sitna Sq 3105, Kladno, Czech Republic.
Faculty of Physical Culture, Palacký University, Tr. Miru 115, Olomouc, Czech Republic.
J Healthc Eng. 2018 Apr 18;2018:2818063. doi: 10.1155/2018/2818063. eCollection 2018.
The article focuses on a noninvasive method and system of quantifying postural stability of patients undergoing vestibular schwannoma microsurgery. Recent alternatives quantifying human postural stability are rather limited. The major drawback is that the posturography system can evaluate only two physical quantities of body movement and can be measured only on a transverse plane. A complex movement pattern can be, however, described more precisely while using three physical quantities of 3-D movement. This is the reason why an inertial measurement unit (Xsens MTx unit), through which we obtained 3-D data (three Euler angles or three orthogonal accelerations), was placed on the patient's trunk. Having employed this novel method based on the volume of irregular polyhedron of 3-D body movement during quiet standing, it was possible to evaluate postural stability. To identify and evaluate pathological balance control of patients undergoing vestibular schwannoma microsurgery, it was necessary to calculate the volume polyhedron using the 3-D Leibniz method and to plot three variables against each other. For the needs of this study, measurements and statistical analysis were made on nine patients. The results obtained by the inertial measurement unit showed no evidence of improvement in postural stability shortly after surgery (4 days). The results were consistent with the results obtained by the posturography system. The evaluated translation variables (acceleration) and rotary variables (angles) measured by the inertial measurement unit correlate strongly with the results of the posturography system. The proposed method and application of the inertial measurement unit for the purpose of measuring patients with vestibular schwannoma appear to be suitable for medical practice. Moreover, the inertial measurement unit is portable and, when compared to other traditional posturography systems, economically affordable. Inertial measurement units can alternatively be implemented in mobile phones or watches.
本文专注于一种非侵入性方法和系统，用于量化接受前庭神经鞘瘤显微手术的患者的姿势稳定性。目前，用于量化人体姿势稳定性的替代方法相当有限。主要缺点是，姿势描记系统只能评估身体运动的两个物理量，并且只能在横平面上进行测量。然而，使用三个三维运动的物理量可以更精确地描述复杂的运动模式。这就是为什么在患者的躯干上放置惯性测量单元 (Xsens MTx 单元)，通过它可以获得三维数据 (三个欧拉角或三个正交加速度) 的原因。使用这种基于三维身体运动不规则多面体体积的新方法，我们可以评估姿势稳定性。为了识别和评估接受前庭神经鞘瘤显微手术的患者的病理性平衡控制，有必要使用三维莱布尼兹方法计算多面体的体积，并将三个变量相互关联。为了满足这项研究的需要，对 9 名患者进行了测量和统计分析。惯性测量单元获得的结果表明，手术后不久（4 天），姿势稳定性没有改善的迹象。结果与姿势描记系统的结果一致。惯性测量单元测量的平移变量（加速度）和旋转变量（角度）与姿势描记系统的结果高度相关。所提出的方法和惯性测量单元在测量前庭神经鞘瘤患者中的应用似乎适用于医疗实践。此外，惯性测量单元具有便携性，与其他传统的姿势描记系统相比，价格经济实惠。惯性测量单元还可以替代地集成到移动电话或手表中。
