What is the role of chorioretinal venous anastomosis in the treatment of central retinal vein occlusion (CRVO)?

Updated: Apr 18, 2019
  • Author: Lakshmana M Kooragayala, MD; Chief Editor: Douglas R Lazzaro, MD, FAAO, FACS  more...
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Answer

Chorioretinal venous anastomosis [47, 48, 49, 50, 51] is performed by creating an anastomosis to bypass the site of venous occlusion in the optic disc. In this procedure, retinal veins are punctured, either using laser or by surgery, through the retinal pigment epithelium and the Bruch membrane into the choroid, thereby developing anastomotic channels into the choroid.

Chorioretinal venous anastomosis reduces macular edema and may improve vision in nonischemic CRVO. The success rate is low, and the complication rate can be quite high, including vitreous hemorrhages and choroidal neovascularization at the anastomosis site.

The exact indication and timing of the procedure has not been clearly studied.


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