放射线治疗鼻咽癌对视诱发电位改变的研究

目的 动态研究鼻咽癌放疗对视诱发电位的改变。方法 对 6 3例鼻咽癌患者于放疗前、放疗终、放疗后的半年和 1,2 ,3年分别做一次视诱发电位 (VEP)检测 ,并进行自身对照分析。结果男组放疗后 1年的VEP潜伏期比放疗前、放疗终显著延长 ,VEP振幅显著下降 ;放疗后 2年的VEP潜伏期比放疗前显著延长 ,而放疗终及放疗后半年、3年的潜伏期与放疗前比较 ,差异无显著性。女组放疗后 2年的VEP潜伏期比放疗前显著延长 ,放疗后 3年的VEP潜伏期比放疗前、放疗终及放疗后半年、1年显著延长 ;而放疗后 0～ 3年的VEP振幅与放疗前比较 ,差异无显著性。结论 放射线治疗鼻咽癌会对患者的视觉神经系统造成一定的损害 ,所出现的延迟性损伤存在着性别差异。

Multifocal electroretinograms in the early stages of diabetic retinopathy

OBJECTIVE: To investigate the characteristics of multifocal electroretinograms (mf-ERG) of different phases in diabetic retinopathy (DR) and its clinical significance. METHODS: Multifocal electroretinograms in patients with DR (I - II stage) were tested with VERIS IV system. RESULTS: In I - II stage, the absolute values of N1, P1 and N2 response densities, and the N1-P1 and P1-N2 response densities were attenuated is a field of about 45 degrees in diameter. CONCLUSION: As a new objective and quantitative examination for spatial visual function, multifocal electroretinograms may be valuable in the diagnosis of diabetic retinopathy.

Multifocal electroretinograms in the early stages of diabetic retinopathy

To investigate the characteristics of multifocal electroretinograms (mf ERG) o f different phases in diabetic retinopathy (DR) and its clinical significance Methods Multifocal electroretinograms in patients with DR (Ⅰ-Ⅱ stage) were tested with VERIS Ⅳ system Results In Ⅰ-Ⅱ stage, the absolute values of N1, P1 and N2 response densities, and the N1 P1 and P1 N2 response densities were attenuated is a field of about 45 deg rees in diameter Conclusion As a new ABSTRACT and quantitative examination for spatial visual function, mul tifocal electroretinograms may be valuable in the diagnosis of diabetic retinopa thy