Purchase this article with an account.
Fabio A. Guarnieri, Fernando Sassetti, Luciano Garelli; A Preliminary Study Of An Active Microvalve For Glaucoma. Invest. Ophthalmol. Vis. Sci. 2012;53(14):339.
Download citation file:
© ARVO (1962-2015); The Authors (2016-present)
In this study, the characterisation of a preliminary design of an active glaucoma drainage device is presented.
The valve is actuated by conducting polymers and fabricated by MEMS technology. The characterisation process is performed by numerical simulation using the finite element method and a circuit model, and by in vitro hydrodynamic testing.
The hydraulic resistance of the designed GDD varies in the range of 13.08-0.36 mmHg min/μl compared with 3.38-0.43 mmHg min/μl for the Ahmed valve. The maximum displacement of the diaphragm in the vertical direction is 18.9 μm, and the strain in the plane is 2%.
The proposed preliminary design allows to control the IOP by varying the hydraulic resistance in a greater range than the existing passive valves, and the numerical simulation facilitates the characterisation and the improvement of the design before its construction, reducing time and costs.
This PDF is available to Subscribers Only