Lectin标记人胎视网膜血管的形态学观察

采用生物凝集素荆豆I（ectin）组化法标记人胎视网膜血管内皮细胞，以显示视网膜各级血管。观察到机网膜大血管自视神经盘处穿出向周边视网膜呈放射状分布。在视神经盘附近，大血管之间无例支交通，但它们之间存在着毛细血管网。自视网膜中部（赤道附近）地区开始，可见较小血管呈逐级典型的观分叉状分支向着周边视网膜分布。动脉血管与静脉血管在胎6月龄后的样本中已能清楚地区分；前者较后者稍细而着色稍深，两者互不伴行。微动脉与微静脉间形成的毛细血管网显示清晰。毛细血管网网眼大小不等，呈不规则的多边形。此外，还在一例样本中见到相邻两支较大血管间的样状吻合。胎6月龄以前，视网膜血管尚未分布到锯齿缘。

An Observation on Retinal Blood Vessels Labeled by Lectin in Human Fetus

Lectin histochemistry technique was used for labeling the endothelial cell of the retinalblood vessels in human fatus. The major retinal blood vesscls appeared from the optic discrunning towards the peripheral of retina in a radial way. Near the optic disc, there was nobranch of communication among these ma jor blood vessels, but capillary network could beseen. In the middle area of retina, dichotomous branches came out from the major blood ves-sels towards the peripheral retina. The arteries and veins could only be distingtished in retinaof six month of gestation. The diameter of the arteries was smaller and it's staining was ofstronger than those 0f veins'. The former was not acompany with the latter and was charac-teristically b0rdered by a capillary-free zone. Capillary network could be seen between thearterioles and venules. The size of the spaces of the capillary network was variable. Most ofthem showed irregular mutiple sides in shape. In addition, an ansa of communication was ap-peared between two comparatively large vessels in one sample. In the age before six monthof gestation, the retinal blood vessels did n0t reach the ora serrata. The author made a dis-cussion and analysis on the result observed.