期刊
RETINA-THE JOURNAL OF RETINAL AND VITREOUS DISEASES
卷 30, 期 2, 页码 300-304出版社
LIPPINCOTT WILLIAMS & WILKINS
DOI: 10.1097/IAE.0b013e3181babe0c
关键词
emulsification; extensional viscosity; Newtonian fluid; oil droplets; poly(dimethyl siloxane); retinal detachment; shear viscosity; silicone oil; tamponade agents; viscoelastic fluid
资金
- Engineering and Physical Sciences Research Council, UK [EP/C546679/01]
- Fluoron GmbH
- Engineering and Physical Sciences Research Council [EP/C546679/1] Funding Source: researchfish
Purpose: The purpose was to study the emulsification of silicone oil tamponade agents that cause clinical complications. This study aimed to increase the emulsification resistance of silicone oil 1,000 to be at least as resistant as silicone oil 5,000 while maintaining the shear viscosity <5,000 mPa/s to aid injection and removal. Methods: High-molecular-weight (423 kDa) poly(dimethyl siloxane) was added to silicone oil 1,000 at 5% and 10% w/w concentration. The shear and extensional viscosity of 1,000 and 5,000, a 50: 50 mixture of 1,000 and 5,000 and 5% and 10% w/w additive blends, respectively, of silicone oil were measured using capillary breakup extensional, rotational shear, and capillary extrusion rheometry. In vitro emulsification was assessed qualitatively after agitation using Pluronic F68 or a protein solution as the emulsion stabilizer. Results: The addition of high-molecular-weight polymer increased the extensional viscosity of the blends at high strain rates to levels equal to or greater than silicone oil 5,000. In all cases, the shear viscosity of the blends was lower than that of silicone oil 5,000. The additive blends were qualitatively as emulsification-resistant as silicone oil 5,000. Conclusion: The addition of low concentrations of very-high-molecular-weight polymers of the same chemistry as the bulk oil has the potential to increase the emulsification resistance of the tamponade agents while maintaining ease of injection and removal. RETINA 30: 300-304, 2010
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