Results: Oils of same centistokes manufactured by different manufacturers behaved differently in terms of their flowability and rates of emptying.
Conclusion: Silicone oils of similar centistokes behaved differently in terms of their rates of flow through a standard 23G vitrectomy system under standard conditions indicating better standardization of the viscosity of silicone oils available in the market.
Keywords: Centistokes (CS) Fluid injection System Silicone Oil Vitrectomy.
Commercially available in various viscosities oils of 1000 to 5000 centistokes are used in vitreous surgery mostly.
In this study the rate of injection of silicone oils with a sheer viscosity of 1000 and 5000 centistokes prepared by different manufacturers and available to vitreoretinal surgeons in Pakistan were compared by measuring their flowability through a standard 23G cannula using
Dimethylpolysiloxane fluids with viscosities of 12,500 and 30,000 centistokes
reportedly give the greatest effectiveness when added to most thermoplastics, including nylons and styrenics.