Intravascular oxygen content decreases after retinal vein occlusion.

<p>Two examples of retinal vein occlusion and oximetry images of retinal vessels from two different rabbits before and after retinal vein occlusion (RVO). (A) Red free image of the normal rabbit retinal vessels before and (B) one hour after retinal vein occlusion. The red asterisks indicates the location of the occlusion. Note the absence of blood column after onset of occlusion. (C) Two examples of pre-RVO and post-RVO pseudocolored oximetry images from red dotted area showing decreased intravascular oxygen content one hour after RVO. (D) Red free image of the normal rabbit retinal vessels before RVO and (E) late phase fluorescein angiogram of same area one hour after retinal vein occlusion. The arrow marks location of non-filling vessel which is difficult to see in late phase fluorescein image. Red dotted area indicates area of pseudocolored oximetry images in panel F. In both panel C and F, note the decrease in the vascular oxygen content after venous occlusion.