Combination stylet and straightening coating for a cochlear...

A - Human Necessities – 61 – N

Patent

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A61N 1/05 (2006.01) A61F 11/04 (2006.01)

Patent

CA 2392996

A cochlear implant electrode assembly device (10) comprising an elongate electrode carrier member (11), a stiffening element (15), and a stiffening sheath (16) that at least partially envelops the elongate member (11). The member (11) is made of a resiliently flexible first material and has a plurality of electrodes (12) mounted thereon. The member (11) has a first configuration that allows it to be inserted into an implantee's cochlea (30). The member (11) also has a second configuration wherein the member is curved to match an inside surface of the cochlea (30), and at least one intermediate configuration between the first and second configurations. Both the stiffening element (15) and sheath (16) are made of a material that is relatively stiffer than the member (11). The stiffening element (15) and the stiffening sheath (16) in combination bias the elongate member (11) into the first configuration. If either the stiffening element (15) or the stiffening sheath (16) is removed or deactivated, the elongate member (11) adopts an intermediate configuration.

L'invention concerne un dispositif d'assemblage d'électrodes pour implant cochléaire (10) pourvu d'un élément porteur d'électrodes allongé (11), d'un élément de raidissage (15), et d'une gaine de raidissage (16) qui enveloppe au moins partiellement l'élément allongé (11). Ledit élément (11) est constitué d'une première matière flexible résiliante et présente une pluralité d'électrodes (12). L'élément (11) possède une première forme qui lui permet d'être introduit dans une cochlée (30) d'un patient et une seconde forme selon laquelle l'élément est courbé pour correspondre à une surface interne de la cochlée (30), et au moins une forme intermédiaire située entre les première et seconde formes. L'élément (15) et la gaine de raidissage (16) sont tous deux constitués d'une matière qui est relativement plus rigide que l'élément allongé (11). L'élément (15) et la gaine de raidissage (16) coopèrent par le biais de l'élément allongé (11) pour aboutir à la première forme. Si on enlève ou désactive l'élément (15) ou la gaine de raidissage (16), l'élément allongé (11) prend une forme intermédiaire.

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