视觉诱发电位在视神经挫伤诊断及预后中的应用

目的探讨视觉诱发电位（VEP）的异常率对视神经挫伤诊断及预后估计。方法对69例（69眼）单倒眼挫伤组进行视力检查及VEP检查，以自体健侧眼为对照组。分析两组间VEPP100波幅值及P100峰潜时值，记录单侧眼挫伤患者的伤眼、对侧眼及治疗后伤眼的VEP。结果挫伤眼VEPP100波幅明显降低，P100峰潜时明显延长，挫伤眼各视力组VEP异常率明显高于对照组，挫伤眼矫正视力〈0．1者VEP异常更明显且预后差。结论VEP是一种客观、定量、定位评定视神经功能的方法，是目前视神经病变最敏感、早期诊断、判断预后的客观检查方法，对视觉功能评价有重要的临床价值。

Application of visual evoked potential in diagnosis and prognosis of optic nerve contusion

Objective To investigate the visual evoked potential abnormalities rate on the diagnosis and prognosis of optic nerve contusion. Methods Unilateral contusion of 69 for visual acuity and VEP examination to the contralateral eye as control self. Analysis of VEP P100 amplitude between the two groups and the time value of P100 peak lateneies. Records of patients with unilateral contusion injury eyes, fellow eyes and eye injuries after treatment of visual evoked potentials. Results Contusion eye VEP P100 amplitude was significantly lower, P100 peak latency was significantly longer,the VEP abnormalities in visual acuity eye contusion group was significantly higher,Contusion eye vision correction 〈 0. 1 VEP abnormalities was more obvious and had poor prognosis. Conclusions VEP is an objective, quantitative assessment of optic nerve function positioning method, optic neuropathy is the most sensitive, early diagnosis, prognosis and objective examination methods, evaluation of visual function has important clinical value.