颞上支与颞下支视网膜静脉阻塞的动静脉交叉以及与盘缘距离的对比观察

The observation of the crossing and distance between the disc and obstruction site in temporal branch retinal vein occlusion

目的 应用回顾性研究方法对比观察颞上支与颞下支视网膜分支静脉阻塞 (BRVO)患者的动静脉交叉点特点以及与盘缘距离的关系。方法 收集颞上支 BRVO患者 5 3例和颞下支 BRVO患者 5 1例的荧光血管造影负片 ,分别观察其颞上支和颞下支第一动静脉交叉点的交叉特点 ,并测定交叉点与盘缘的距离 ,应用 t检验和 x2检验进行统计学比较。结果 颞上支 BRVO5 3例 ,男性 2 7例 ,女性 2 6例 ,平均年龄为 5 6 .72岁。颞下支 BRVO5 1例 ,男性 2 8例 ,女性 2 3例 ,平均年龄为 5 2 .82岁。两组患者的受累支动静脉第一交叉点与盘缘的平均距离均明显短于正常支。颞上支 BRVO组受累支第一动静脉交叉点动脉走在静脉之上 (正交叉 )者 5 1例 ,颞下支为 45例 ;颞下支BRVO组的颞侧上下支均为动脉走在静脉之上。经统计学检验 ,颞上支 BRVO正交叉数目与正常支比较有明显性差异。结论 颞上支和颞下支 BRVO的发生与受累支动静脉第一交叉点与盘缘距离过短有密切的统计学关系 ,也与受累动静脉正交叉数目有关系。

Objective The retrospective observation was applied to investigate the crossing characteristics and the distance between the disc and the first crossing site in both super-temporal and infer-temporal branch retinal vein occlusion.Methods 53 cases of super-temporal BRVO and 51 cases of infer-temporal BRVO were collected to measure the distance between the disc and the first crossing site and to observe the artery-vein crossing characters.Results The sex distribution in both group was similar,but the average age in super-temporal BRVO is older than that of the inferior-temporal BRVO.The distance between disc to the crossing site in super-temporal BRVO group was shorter than any other quarts.In super-temporal BRVO group,there were 51 cases with artery over the vein.All of the patients in inferior-temporal BRVO group were artery over vein.Conclusion The mechanism of branch retinal vein occlusion is related with the near distance between the disc and the first crossing,and is also related with th numbers of the artery over the vein.