眼静息电位向眼周的扩散现象和临床应用

Diffusing phenomenon and clinical application of eye's standing potential

目的 通过实例来证明眼静息电位向眼周扩散现象的存在 ,揭示 2眼静息电位扩散的互相影响 ,并探讨此扩散现象在临床上的应用价值。方法 本研究对象共 92眼 ,分2组 ,对照组 5 6眼 ,病变组 36眼 ,应用 DSL15 0 0视觉电诊断系统记录眼电图的眼动演示功能 ,经增加程序使波形可在屏幕上冻结并有测量功能 ,记录病变组及对照组眼静息电位 ,并分析静息电位的振幅量和两眼静息电位的极性。结果 对照组 ,静息电位的范围为 0 .83～ 1.6 3m V ,平均为 1.12 m V±0 .16 m V,两眼静息电位波形均为同相 ;在独眼病例组中 ,有眼侧的静息电位范围 1.15 m V± 0 .3m V,无眼侧的静息电位范围 0 .2 1m V± 0 .12 m V,且极性全部相反 ;在视网膜脱离组和眼内炎组中 ,脱离时间较长的病例静息电位低于对照组且极性相同 ,病史较短的病例静息电位与对照组相似且极性相同 ,完全丧失视网膜功能的病例记录到的静息电位与独眼病例无眼侧的静息电位相似且极性相同。结论 眼静息电位具有向眼周扩散的特征 。

Objective To testify the existence eyes' standing potential(SP) diffusing phenomenon to its periphery through clinical examples, disclose the interaction of both eyes' SP diffusion and probe the clinical application value of this diffusion phenomenon. Methods Ninty two eyes were divided into 2 groups: control group ,56 eyes;ill group, 36 eyes. To record the showing function of eyes' movement of electro oculogram(EOG) by using DSL 1500 Visual Diagnosis System. This method could be used to freeze wave form in the screen by increasing procedure, recorded the SP of 56 normal eyes and 36 abnormal eyes respectively and analyzed the SP's amplitude of vibration and polarity of both eyes' SP.Results In the control group, the scope of SP was 1.63～0.83mV, average: 1.12mV±0 16mV. The wave forms of both eyes' SP were the same ; In the monophthalmia group ,SP of existed eye was 1 15mV±0.3mV,the invalid eye was 0.21mV±0.12mV, the polarity was opposite. In the group of retinal detachment and endophthalmitis, SP of long history cases was lower than that of the control group and the polarity was the same .SP of short history cases was similar to that of the control group and the polarity was the same .SP of the cases without retinal function was similar to that of the invalid eyes of only eye case and the polarity was the same.Conclusion SP possesses the character of diffusion to its periphery. We can evaluate the retinal function according to the amplitude and polarity of SP.