INDUCED OCULAR HYPERTENSION DURING PHOTOCOAGULATION OF AFFERENT ARTERY IN ANGIOMATOSIS RETINAE

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Abstract
Intraretinal arteriovenous shunts cause massive dilatation and high flow in the afferent artery, which cannot be occluded by photocoagulation alone due to rapid dissipation of heat, preventing the desired damage to vascular endothelium. A vacuum pump and perilimbal suction cup were used to raise intraocular pressure sufficiently to stop retinal arterial flow during photocoagulation of the afferent artery supplying a retinal capillary hemangioma (von Hippel tumor). The technic should also be useful in occlusion of enlarged feeder vessels in other conditions in which treatment of the more distal shunt itself is undesirable or impossible.

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