Flow of subretinal liquid through the retinal hole after surgery – mechanical model and FEM simulations
The objective of this study is to analyze subretinal liquid dynamics by means of numerical simulations in patients with retinal detachment after insertion of intussusception. The main parameter being analyzed is the outflow velocity of subretinal fluid through the hole in the retina. All calculations were performed using FEM and the results were evaluated in relation to the velocity of outflow when considering parameters such as; i) speed of eyeball movement, ii) shift of intussusception in relation to the center of the hole in the retina, iii) viscosity of the subretinal fluid. Results obtained suggest an optimal speed of eyeball movement for patients to achieve maximal speed of outflow of subretinal fluid. This is a significant factor in achieving improved clinical outcomes for patients.
Keywordsretinal detachment CFD simulations FEM analysis
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- 1.Angunawela, R. I., Azarbadegan, A., Aylward, G. W., Eames I.: Intraocular Fluid Dynamics and Retinal Shear Stress after Vitrectomy and Gas Tamponade. Investigative Ophthalmology and Visual Science. 52, No. 10, (2011)Google Scholar
- 2.Bottega, W. J., Bishay, P. L.: On the Mechanics of a Detaching Retina. Mathematical Medicine and Biology. 30, 287–310 (2013)Google Scholar
- 3.Clemens, S., Kroll, P., Stein, E., Wagner, W., Wriggers, P.: Experimental Studies on the Disappearance of Subretinal Fluid After Episcleral Buckling Procedures Without Drainage. Graefe´s Arch. Clin. Exp. Ophthalmol. 225, 16–18 (1987)Google Scholar
- 4.Donea, J., Huerta, A.,: Finite Element Methods for Flow Problems. Chichester, (2003)Google Scholar
- 5.Foster,W. J.: Bilateral Patching in Retinal Detachment: Fluid Mechanics and Retinal ´Settling´. Investigative Ophthalmology and Visual Science. 52, (2011)Google Scholar
- 6.Foster, W. J., Dowla, N., Joshi, S. Y., Nikolaou, M.: The Fluid Mechanics of Scleral Buckling Surgery for the Repair of Retinal Detachment. Graefe´s Arch. Clin. Exp. Ophthalmol. 248(1), 31–36, (2010)Google Scholar
- 7.Kling, S., Marcos, S.: Finite-Element Modeling of Intrastromal Ring Segment Implantation into a Hyperelastic Cornea. Investigative Ophthalmology and Visual Science. 54, (2013)Google Scholar
- 8.Lakawicz, J. M., Bottega, W. J.: An Analysis of the Mechanical Behaviour of a Detaching Retina. Mathematical Medicine and Biology. 32, 137–161, (2015)Google Scholar
- 9.Seabag, J.: Vitreous in Health and Disease. Springer, New York, (2014)Google Scholar
- 10.Williamson, T. H.: Intraocular Surgery. Springer, Switzerland, (2016)Google Scholar
- 11.Zienkiewicz, O. C., Taylor, R. L.: The Finite Element Method. Vol. 1âĂŞ3, fifth ed.Butterworth-Heinemann, Oxford, (2000)Google Scholar
- 12.Zienkiewicz, O. C., Taylor, R. L., Nithiarasu, P.: The Finite Element Method for Fluid Dynamics, seven ed. Butterworth-Heinemann, Oxford, (2014)Google Scholar