A Study on Arteriovenous Crossing Sites in Branch Retinal Vein Occlusion.

Na, Kyoung Soo; Yoon, Hi Mo; Ji, Nam Chul

Original Article

Journal of the Korean Ophthalmological Society 1992;33(2):148-153.
Published online February 1, 1992.

A Study on Arteriovenous Crossing Sites in Branch Retinal Vein Occlusion.

Kyoung Soo Na, Hi Mo Yoon, Nam Chul Ji

Department of Ophthalmology, College of Medicine, Chosun University, Korea.

망막분지정맥폐쇄의 동정맥교차부위에 관한 연구

나경수(Kyoung Soo Na),윤희모(Hi Mo Yoon),지남철(Nam Chul Ji)

Abstract

Retinal arteriovenous crossing sites are important because they are generally the points at which. in branch retinal obstruction, a blockage of venous blood flow occurs. We evaluated retrospectively the cases of 54 patiens wIth a recent temporal branch retinal vein occlusion to determine the relative anatomic position of the obstructed vein in relation to its crossing artery. In 54 (100%) of 54 eyes, the artery lay antenor to the vein, toward the vitreous cavity. In the control corssing site, the artery lay anterior to the vein 41.3% (J9/46) of the time (p<0.01) The second control group, which was obtained by examining all of the first-and second-order, without BRVO, consisted of 103 crossing sites. In this second control group's artenovenous crossmgs, the arteries were situated anteriorly in 83 (80.6%) of 103 crossing sites (p<0.005). Our observation that the artery lies anterior to the vein at the all of BRVO crossing sites contributes further evidence that mechanical factors play a prominent role in the causing BRVO.

Key Words: Branch retinal vein occlusion;Arteriovenous croossing site