Implantable ocular microapparatus to ameliorate glaucoma or...

A - Human Necessities – 61 – F

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A61F 9/007 (2006.01)

Patent

CA 2674899

A microapparatus (11) implantable in the eye (13) comprises 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 us a membrane of conductive polymeric material with these same properties and whose ohmic resistance varies with the mechanical deformation produced by the ocular pressure.

L'invention porte sur un microappareil (11) implantable dans l'oeil (13) comprenant une microvalve quasi-bistable (21) commandé par un capteur de la pression intraoculaire (23) in situ. Le mécanisme à microvalve comprend une membrane (27) de polymère conjugué (29) très déformable et biocompatible, dont le volume dépend du potentiel électrique qui lui est appliqué par sa paire d'électrodes (31). Le capteur et la valve de l'actionneur sont reliés à un canal d'évacuation (15), le premier se déformant sous la pression du globe oculaire et le deuxième se gondolant pour normalement fermer le canal d'évacuation. Le capteur utilise une membrane de polymère conducteur aux propriétés identiques et dont la résistance ohmique varie avec la déformation mécanique produite par la pression oculaire.

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