PubMed · 942594
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P A Hersch. 1976. X-t-programming a binary gas stream.. https://doi.org/10.1016/s0003-2697(76)80055-3
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30 eyes with rhegmatogenous retinal detachment due to retinal tear at the upper half of the circumference or due to a macular hole underwent SF6 gas injection into the vitreous. In 25 eyes (83%) the retina had re-attached 1-2 days following the injection and the tear was then photocoagulated. Final visual acuity was 6/12 or better in 13 eyes, 6/15-6/20 in 4 eyes, 6/30-6/60 in 8 eyes and less than 6/60 in 5 eyes, 3 of which had a macular hole. There was no morbidity or irritation compared to conventional scleral buckling, and the functional results were better. 4 of the 5 failures underwent successful surgery. In only 1 eye the retina could not be attached by surgery. Pneumatic retinopexy can substitute for surgery in selected cases of retinal detachment.
The injection of expandable gas into the vitreous is a new method for treating retinal detachment. The injected gas bubble seals the retinal break and allows absorption of subretinal fluid. In 12 patients, in all eyes treated by injection of sulfur hexafluoride, the detached retina became reattached. In 3 eyes (25%) detachment recurred. To achieve attachment again, both vitrectomy and the circling band operation were performed in 2 of them, and only the latter operation in the third. Risk factors for redetachment included detachment of the macula, retinal detachment larger than 5-o'clock-hours, and pseudophakia. Proper selection of patients for gas injection is most important.
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