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Ashwin Mohan, Priya Srinivasan, Supriya Dabir, Rajani Battu, Naresh Kumar Yadav, Rohit Shetty; Oxygen saturation profiles in Asian Indian eyes with central retinal artery occlusion (CRAO). Invest. Ophthalmol. Vis. Sci. 2015;56(7 ):3311.
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© ARVO (1962-2015); The Authors (2016-present)
To study the oxygen saturation profiles in Asian Indian eyes with central retinal artery occlusion (CRAO)
This is a retrospective review of 10 patients presenting to our hospital in the last 6 months with a history of sudden painless loss of vision and diagnosed as CRAO on clinical examination. In addition to a comprehensive ophthalmic examination, they underwent retinal oximetry (Oxymap T1, Oxymap hf, Reykjavik, Iceland). 2 patients had oximetry pre and post anterior chamber paracentesis and 3 patients had a follow up Oximetry at monthly intervals. Optic disc centered images taken after dilatation were analysed by selecting the thickest arteriole and venule per quadrant for saturation and diameter.
The oxygen saturation was decreased in both the arterioles (86%) and venules (50%). The arteriolar and venous diameters and the arterio-venous saturation difference did not vary significantly between the groups. In the 3 patients on follow up we saw an improvement of arteriolar saturations in all and venous values in 2 of them. Two patients who underwent anterior chamber paracentesis showed an improvement of both arteriolar and venous saturation values after paracentesis.
Oximetry in CRAO shows an initial fall in saturations with an increase over time or after paracentesis.
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