海德堡视网膜断层扫描仪测量黄斑厚度的 可重复性研究

目的对海德堡视网膜断层扫描仪（HRT）黄斑水肿分析软件（MEM）进行黄斑厚度测量的可重复性评价。方法对62名正常人（9～68岁）用HRT-Ⅱ黄斑程序进行检查，对黄斑部视网膜信号宽度、中心凹视网膜信号宽度和黄斑水肿指数进行均数分析、t 检验和相关分析，对个体内重复测量的变异性采用变异系数、95%耐受限（TC）、类内相关系数（ICC）进行研究。结果正常人的黄斑部视网膜信号宽度为（0.734±0.236） mm，中心凹视网膜信号宽度为（0.781±0.243）mm，平均水肿指数E=（1.169±0.619）。各参数的重复测量变异系数分别为：视网膜信号宽度（8.7±6.8）%，中心凹视网膜信号宽度（8.5±6.7）%, 平均水肿指数（15.6±13.9）%；个体内连续重复测量发生改变的95%TC分别为，视网膜信号宽度0.131（8.9%）；中心凹信号宽度0.137（10.5%）；平均水肿指数0.198（7.4%）。同一操作者对同一个体进行多次重复测量的ICC分别为：黄斑区视网膜信号宽度0.950；中心凹信号宽度0.949；平均水肿指数0.898。结论海德堡视网膜断层扫描仪MEM软件，具有无创、快速、可重复性较好等特点，为视网膜厚度相关的黄斑疾病的客观定量监测提供了一种新的手段。(中华眼底病杂志,2005,21:103-105)

Reproducibility of Heidelberg retinal tomograph measuring the macular retinal thickness

ObjectivesTo evaluate the reproducibility of Heidelberg retina tomograph (HRT) macular edema module(MEM) measuring the macular retinal thickness.MethodsSixty-two healthy volunteers (9-68 years old) were examined by HRT-II procedure. The retinal signal width (SW) at macula and fovea and macular edema index (E) were recorded for t-test, Pearson linear-correlation analysis. Intra-subject variation repeatedly measured was analyzed with coefficient of variation, 95% tolerance limits of change (TC), and intra class coefficient of correlation (ICC).ResultsIn healthy individuals, retinal SW was (0.734±0.236) mm at macula，and (0.781±0.243) mm at fovea; macular E was (1.169±0.619). The coefficient of variation repeatedly measured: retinal SW was (8.7±68)%，retinal SW at the fovea was (8.5±6.7)%, and the average was (15.6±13.9)%; 95%TC of intra-subject sequential repeated measurement was 0.131 (8.9%) of retinal SW, 0.137 (10.5%)of fovea SW，and 0.198 (7.4%) of average E. ICC of one individual repeatedly measured by one operator was 0.950 of macular SW, 0.949 of fovea SW, and 0.898 of average edema index.ConclusionsHRT-II MEM is noninvasive, fast and highly reproducible, which provides a new technique to monitor the objective quantification of macular diseases related to retinal thickness. ( Chin J Ocul Fundus Dis, 2005,21:103-105)