Which procedure may be used to manage CRAO and help reperfuse ischemic tissue?

Carbogen inhalation is a procedure that involves the inhalation of a gas mixture containing carbon dioxide and oxygen, which has been shown to help improve blood flow and oxygen delivery to ischemic tissues, particularly in cases of Central Retinal Artery Occlusion (CRAO). This technique acts by inducing vasodilation, which can lead to increased perfusion to the affected areas, potentially decreasing the extent of ischemic injury in the retina. It utilizes the physiological response to elevated carbon dioxide levels, stimulating the body to increase blood flow to the regions that are not receiving adequate circulation.

In contrast, cold compress application is primarily used to reduce swelling or alleviate pain but does not actively facilitate reperfusion of ischemic tissue. Resting the affected eye might help minimize discomfort but it does not address the underlying vascular occlusion. Topical corticosteroids are often employed to reduce inflammation, but they do not improve blood flow or resolve the occlusion in cases of CRAO. Thus, carbogen inhalation is the most effective option for reperfusing ischemic tissue in this scenario.