Implantable ocular microapparatus to ameliorate glaucoma or an ocular overpressure causing disease
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United States of America Patent
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Jun 26, 2012
Grant Date -
Feb 18, 2010
app pub date -
Dec 17, 2007
filing date -
Jan 8, 2007
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Abstract
A microapparatus (11) implantable in the eye (13) includes a cuasi-bistable microvalve (21) commanded by an intraocular pressure sensor (23) in situ. The microvalve mechanism includes a diaphragm (27) made of a conjugated polymer (29) that shows high deformation and biocompatibility capabilities and which volume depends from the electric potential applied by its pair of electrodes (31). The sensor and actuator-valve are coupled to a drainage conduit (15), the first to deform by the pressure in the ocular globe and the second in a position of buckling to normally close the drainage conduit. The sensor has a membrane of conductive polymeric material with these same properties and whose ohmic resistance varies with the mechanical deformation produced by the ocular pressure.
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