【摘要】 为了评价动静脉交叉在视网膜分枝静脉阻塞（ＢＲＶＯ）发病中的作用，我们对５０名ＢＲＶＯ患者的ＦＦＡ负片进行了分析，并以同一患者的同一眼的对侧血管弓及对侧眼的相同象限的相应的动静脉交叉作为对照组。结果发现：本组ＢＲＶＯ患者有８０％发生在颞上象限，１６％发生在颞下象限，４％发生在鼻上象限。且阻塞点均位于动静脉交叉处，而动静脉交叉处动脉位于静脉之前且交叉与视盘距离近是ＢＲＶＯ发病的解剖学方面的危险因素。更多还原

【Abstract】 To evaluate the role of the arteriovenous crossing in the pathogenesis of the branch retinal vein occlusion, we studied fluorescein angiograms of 50 patients with branch vein occlusion (50 eyes).Two comparison groups were formed by identifying corresponding arteriovenous crossing for each occluded crossing in (1) the ipsilateral but opposite vessel arcade within eyes affected by BRVO,and(2) the same quadrant in unaffected eyes of BRVO patients.We found that 40 (80%)occlusions involoved the superatemporal quadrant,and 8(16%) occlusions occurred in the inferiatemporal quadrant,2(4%) occlusions occurred in the nasal superior quadrant.The site of obstruction of the branch vein was an arteriovenous crossing in all affected eyes.And the distance from the disc margine to the site of arteriovenous crossing were shorter than that of the two control groups.These results suggest that the arteriovenous crossing of the artery anterior to the vein and short distance from the disc margine to the site of arteriovenous crossing are the anatomical factors in the pathogenesis of BRVO.更多还原