INTEC   05402
INSTITUTO DE DESARROLLO TECNOLOGICO PARA LA INDUSTRIA QUIMICA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
CHARACTERIZATION OF AN ACTIVE MICROVALVE FOR GLAUCOMA USING FLUID-STRUCTURE INTERACTION
Autor/es:
FERNANDO L. SASSETTI; FABIO A. GUARNIERI; LUCIANO GARELLI; MARIO A. STORTI
Lugar:
Rosario
Reunión:
Congreso; XIX Congreso sobre Métodos Numéricos y sus Aplicaciones; 2011
Institución organizadora:
ASOCIACIÓN ARGENTINA DE MECÁNICA COMPUTACIONAL AMCA
Resumen:
Glaucoma Drainage Device (GDD) have the potential to eliminate hypotony but still suffer
from poor flow control and fibrosis. The ideal shunt should change its hydraulic resistance to achieve
the desired intraocular pressure. In this work the characterization of a preliminary design of a new GDD
is presented. This is activated by means of a diaphragm, which is actuated by conducting polymers.
The valve can be manufactured employing Micro Electro Mechanical System (MEMS) technology by
soft lithography. The characterization process is performed by numerical simulation using the Finite
Element Method, considering the coupling between the fluid and the structure (diaphragm), obtaining
the hydraulic resistance for several positions of the diaphragm. In order to analyze the hydraulic system
of the microvalve implanted in a human eye an equivalent circuit model was used. The parameters
of the equivalent circuit model were obtained from numerical simulation. The designed GDD has a
greater range of variation of the hydraulic resistance if compared with the Ahmed valve. The proposed
preliminary design allows to control intraocular pressure (IOP) by varying the hydraulic resistance in a
greater range than existing passive valves and the numerical simulation facilitates the characterization
and the improvement of the design before its construction, reducing time and costs.