PMID: 9541819May 9, 1998Paper

Chorioretinal venous anastomoses: effect of different laser methods and energy in human eyes without vein occlusion

Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie
Ian L McAllisterIan J Constable

Abstract

This study was performed to determine the laser energy required to rupture both Bruch's membrane and retinal veins reliably in order to create a venous chorioretinal anastomosis. A histological examination was conducted of argon green and YAG laser applications to the retina made prior to enucleation in eight eyes with large intraocular melanomas. Argon laser application of 50 microns in size and 0.1 s duration to intervascular areas of the retina will reliably rupture Bruch's membrane at a power level of at least 1.5 W. If the argon laser spot is placed overlying a retinal vein, a power level of up to 2.5-3.0 W will rupture Bruch's membrane in 60%, with only 34% of the retinal veins showing evidence of rupture. The YAG laser with power levels of 3-4 mJ will reliably rupture the retinal vein in cases where it has not previously been ruptured by the argon laser. When attempting to create a chorioretinal venous anastomosis in an eye with a non-ischaemic central retinal vein occlusion, Bruch's membrane should be ruptured first by placing the argon laser application at the side of the retinal vein before an attempt to rupture the retinal vein itself is made in case haemorrhage from the ruptured vein obscures the view. A power level...Continue Reading

Citations

Jun 1, 2005·The British Journal of Ophthalmology·R J AntcliffJ S Shilling
Apr 30, 2005·American Journal of Ophthalmology·Tom H Williamson, Annie O'Donnell
Jan 6, 2004·International Ophthalmology Clinics·Atul Sharma, Donald J D'Amico
Oct 5, 2001·Eye·J S MehtaA M Hamilton
Apr 30, 2020·Ophthalmic Surgery, Lasers & Imaging Retina·Xiaoyu Xu, K Bailey Freund
Jan 22, 2002·Journal of Clinical Laser Medicine & Surgery

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