应用视觉诱发电位检测早期视神经挫伤

目的：探讨视觉诱发电位（VEP）在外伤性视神经挫伤中的诊断价值。方法：对169例临床诊断为外伤性视神经挫伤的患者行VEP检测，并与自体健侧眼和正常对照组对比。结果：169例患者（单眼155例，双眼14例）共183只眼，VEP检查结果均有不同程度异常。其中5例7眼VEP波幅明显降低（4％），125例133眼单纯波幅降低（73%），潜伏期延长者49例54眼（28％）。受伤眼均与自体健侧眼和正常对照组比较，P100波幅差异有显著意义（P〈0．01），49例P100峰潜伏期略延长，与正常值对比无明显差异（P〉0．05）。结论：VEP对外伤后视神经挫伤的检出敏感性较高，因此对外伤性视神经挫伤的早期诊断、预后评估有重要价值。

Detection of early optic nerve contusion with visual evoked potential (VEP)

Objective:To explore the diagnostic value of VEP in patients with optic nerve contusion following ocular damage.Methods:VEP detection was performed in 169 patients with optic nerve contusion diagnosed clinically,and the resultswere compared with the contralateral healthy eyes and a normal control group.Results:VEP was determined in 183 eyes of 169 patients,simple decrease of amplitude was found in 133 eyes of 125 cases(73%),and prolongation of latency in 54 eyes of 49 cases(28%).There was a significant difference in amplitudes of P100among the damaged eyes,the contralateral healthy eyes and the nomal group(P<0.01).But no significant difference was noted in the latency of P100 compared with the normal value.Conclusion:VEP might be more sensitive in the derection of optic nerve damage following ocular contusion.It might be of important role in the early diagnosis of optic nerve contusion following ocular damage.