State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Sun Yat-Sen University, Guangzhou, China.
Transl Vis Sci Technol. 2024 Oct 1;13(10):30. doi: 10.1167/tvst.13.10.30.
The purpose of this study was to design an objective method for measurement of head positions as achieved with use of a microelectromechanical systems (MEMS) sensor. In addition, to use this system to observe the abnormal head position (AHP) in patients with congenital superior oblique palsy (SOP) before and after their surgery.
An MEMS sensor was designed for recording of the pitch, roll, and yaw values of the head position in real time. The MEMS sensor was then fixed on the synoptophore from -30 degrees to +30 degrees positions horizontally and vertically to test the accuracy of these measurements. Then, we tested 13 participants with AHP using the MEMS method and the photographic method and compared their correlations. Finally, the pitch, roll, and yaw values of head positions were measured using this MEMS sensor in 31 patients with congenital SOP as performed before and after their surgery.
The MEMS sensor (LPMS-B2; Alubi, Guangzhou, China; 400 hertz [Hz]), as based on the theory of a gyroscope, was designed and connected to a smartphone via Bluetooth. It was able to conveniently record the patient's pitch, roll, and yaw head positions in real time, recordings which were consistent with the scales of the synoptophore (P > 0.05) and good correlations with the photographic method (P < 0.001). The main preoperative AHP in patients with SOP was roll (22/31, 71%). Pre- and postoperative vertical deviations were 16.4 ± 7.3 prism diopters (PD) and 4.1 ± 4.2 PD, respectively (P = 0.001). The AHP in patients with SOP was positively correlated with the angle of extorsion in the dominant eye (P = 0.01), rather than that of the vertical deviation.
The MEMS sensor described in this report is a simple, practical, and accurate objective device for use in head position measurements. In patients with SOP, the AHP is related to the angle of extorsion in the dominant eye.
The MEMS sensor was designed as a micro-wireless dynamic high-precision device for AHP measurement, which has the potential for use in a clinic.
本研究旨在设计一种基于微机电系统（MEMS）传感器测量头位的客观方法。此外，使用该系统观察先天性上斜肌麻痹（SOP）患者手术前后的异常头位（AHP）。
设计了一种 MEMS 传感器，用于实时记录头位的俯仰、横滚和偏航值。然后，将 MEMS 传感器固定在斜视计上，从-30 度到+30 度的水平和垂直位置，以测试这些测量的准确性。然后，我们使用 MEMS 方法和摄影方法对 13 例 AHP 患者进行测试，并比较了它们的相关性。最后，使用 MEMS 传感器测量了 31 例先天性 SOP 患者手术前后的头位俯仰、横滚和偏航值。
基于陀螺仪原理，设计了 MEMS 传感器（LPMS-B2；Alubi，广州，中国；400 赫兹[Hz]），并通过蓝牙与智能手机连接。它能够方便地实时记录患者的头位俯仰、横滚和偏航，与斜视计的刻度一致（P>0.05），与摄影方法具有良好的相关性（P<0.001）。SOP 患者的主要术前 AHP 是横滚（22/31，71%）。术前和术后垂直偏斜分别为 16.4±7.3 棱镜度（PD）和 4.1±4.2 PD（P=0.001）。SOP 患者的 AHP 与主导眼的外旋角度呈正相关（P=0.01），而与垂直偏斜无关。
本报告中描述的 MEMS 传感器是一种简单、实用、准确的头位测量客观设备。在 SOP 患者中，AHP 与主导眼的外旋角度有关。
杨安
