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Updated: Feb 8, 2026

Enhanced Oil Recovery using a Combination of Biosurfactants
Published on: June 3, 2022
Sandwich technique using a combination of perfluoropropane and silicone oil for inferior retinal detachment
Sumit Randhir Singh1, Deven Dhurandhar1, Jay Chhablani1
1L V Prasad Eye Institute, Smt. Kanuri Santhamma Centre for Vitreo-Retinal Diseases, Hyderabad, Telangana, India.
Abstract:
We report a novel surgical sandwich technique using a combination of intraocular perfluoropropane (C3F8) and silicone oil for inferior retinal detachment (RD). After conventional pars plana vitrectomy and posterior vitreous detachment induction, fluid-gas exchange using 14% C3F8was done. This was followed by silicone oil injection using automated infusion pump to 50% fill of the vitreous cavity under direct visualization to achieve formation of two bubbles - gas bubble superiorly and silicone oil inferiorly. The patient was subsequently asked to maintain upright position. The two immiscible bubbles of C3F8and silicone oil provide tamponade to superior and inferior retina, respectively. With time, gas bubble reduces in size with a gradual superior shift of silicone oil. This novel sandwich technique achieves complete attachment of retina and reduces the risk of retinal redetachment in inferior RDs by adequately tamponading the inferior retina.
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