1125 Experimental and histopathologic study of two types of encircling scleral explants in 33 rabbits

m: Silicone/fluomsilicone copolymer oii (SiFO) is a polysiloxane derivative potentially us&d as mtraoperative tool and long term retinal tatnponade agent. SiFO is characterized by higher-than-water density and low viscosity; its intraocular tolerance in rabbits up to two months is siroilra to that of silicone oil. &j&t&. SiFO was used in 9 eyes with complicated retinal detachment. Five patients had rhegmatogenous retinal detachment and severe vitrexetinopathy, 4 had proliferative diabetic retinopathy with mxular tractional retinal detachment and one had a tractional retinal detachment following expulsive hetnorrhape. All cases rewired retinal tamwnade inferiorlv or Dosteriorlv. In 4 p&nts S-F0 was used &or the retina &ilattencd with ~gaskhdd e&ange and/or pertluot&n liquid injection. In all other patients SiFG was used to dlsphxx subretinal fluid from the anterior retinal brakes and left in the eye as a short term tamponade. SiFO was removed afler two months. &j&g: In all patients the retina could be flattened intraoperatively. Eight of nine eyes (88.8 %) remained attached with follow-up of 2 months. P&l cmulsiflcation was noted in 5 of 9 eyes (55,5 %). No other ocular adverse etTezt$ we found at the end of follow-uo. Conclusions: SiFO seems to be a kid imraoperative tool and short texm retinal tamponade agent in cases of complicated retinal detachment requiring inferior or posterior tampwade. EKPEIUMENTAL INTRAOCULAR TOLERANCE OF TWO PERFLUOROPEENANTRENES ( PPP’S ) EFFECTS ON THE RETINAL VASCULAR SYSTEM KOBUCH K. UBDA N. NASEMANN I. STE’ITER M. LE-RIJPPEXT K. GABEL V.P Department of Ophthalmology Universily clinic Regemburg (G)