摘要视觉诱发电位检查项目与记录参数和刺激参数有关,其中图形视觉诱发电位(PVEP)波形稳定,常作为主要的视觉功能客观评定指标,而闪光视觉诱发电位(FVEP)则变异较大,参考价值较低.通常在PVEP不明显或未记录到时,需要记录FVEP作为参考.单一做FVEP检查临床意义不大,建议将视觉诱发电位检查与视网膜电图联合应用,将更能全面反映视觉功能情况.必要时还需要与眼电图、多焦视网膜电图、图形视网膜电图等检查项目联合应用.多焦视觉诱发电位(mfVEP)能够记录多个局部图形刺激后的视觉诱发电位,以期客观反映局部视野的变化,如青光眼患者视野的早期变化.mfVEP的波形起源与传统的视觉诱发电位不完全相同.mfVEP的检查结果与刺激方式(刺激图形空间频率、对比敏感度、时间频率)、记录通道(单通道、双通道、四通道)、信号提取方法及信号的信噪比关系密切,即检查手段并未完全成熟,使其临床应用受到了限制.任何视觉电生理检查项目结果均存在一定的变异和波动.因此,对临床视觉电生理检查结果的分析还必须结合患者的主诉、临床症状、体征和其他临床检查项目.

abstractsVisual evoked potential testing items depend on stimuli and recording parameters.There is great variation in flash visual evoked potential (FVEP),while the pattern visual evoked potential (PVEP) is stable.The later is taken as the main objective assessment of visual function indicators in clinical.Only when PVEP cannot be recorded or the waves are hard to be recognized,the FVEP will be a reference indicator.There is less clinical meaning to do FVEP testing alone.Recommended visual evoked potential and electroretinogram in combination will be more comprehensive response visual function.If it is necessary,electrooculogram,multifocal electroretinogram,pattern electroretinogram should apply to test together in some case.Multifocal visual evoked potential(mfVEP) were developed to record local field response,such as the early field change in glaucoma.The mfVEP is not a small version of the conventional visual evoked potential,since the generated source in both is different.The waves of mfVEP are related to the stimulation (spatial,temporary and contrast),recording channel (single,double or four),and method for signal extracting and signal nose ration.It is a potential objective assessment method for retinal ganglion cell or optic nerve and still needs further improvement.There will be variable and fluctuation in any visual electrophysiological testing results,the explanation for the results should be relay on complains,symptom,signs and other laboratory examination results.