论文部分内容阅读
目的：探讨视网膜振荡电位（ｏｓｃｉｌｌａｔｏｒｙ ｐｏｔｅｎｔｉａｌｓ， ＯＰｓ）的频域和时域分析方法及其临床应用。方法：测定了６１ 例１３２ 只早期糖尿病视网膜病变患眼和４０ 只正常对照眼的ＯＰｓ，对ＯＰｓ作快速富里叶变换得到ＯＰｓ的频谱，比较早期糖尿病视网膜病变患眼和正常眼的ＯＰｓ频域和时域各参数的改变。结果：早期糖尿病视网膜病变患眼ＯＰｓ１５０～２１０ Ｈｚ平均频谱的幅度显著下降，第三和第四个子波的潜伏期显著延长，四个子波的振幅以及振幅总和均显著下降。结论：本研究所提供的方法可为临床早期诊断糖尿病视网膜病变提供新的有效客观指标。
Objective: To investigate the methods of frequency and time domain analysis of oscillatory potentials (OPs) and their clinical application. Methods: The OPs of 61 patients with early diabetic retinopathy and 40 normal control eyes were measured. The OPs spectrum was obtained by fast Fourier transform of OPs. The frequency of OPs in patients with early diabetic retinopathy and normal eyes was compared with that in normal eyes. Changes in time domain parameters. Results: The average spectrum amplitude of OPs150 ~ 210 Hz in patients with early diabetic retinopathy was significantly decreased, the latency of the third and fourth wavelets was significantly prolonged, and the amplitude and amplitude of the four wavelets were significantly decreased. Conclusion: The method provided in this study can provide new and effective objective indicators for early diagnosis of diabetic retinopathy.