Figure 1
From: Intra-retinal Arterial Cannulation using a Microneedle for Central Retinal Artery Occlusion
Surgical procedure for retinal-arterial fibrinolysis to treat eyes with central retinal arterial occlusion with a microneedle. The outer diameter of the microneedle is 50 micrometers although it appears larger in the intraoperative photograph due to perspective. It is held in the right hand and inserted into the central retinal artery while holding a soft-tip needle in the left hand to stop any bleeding (A). Tissue plasminogen activator solution is injected into the vessel through the microneedle (B). The arterial vessel turns white in response to the pressure of injected solution (C). The solution is injected over a 3-minute period, and the needle is removed gently (D).
