Pre-curved cochlear implant electrode array

A - Human Necessities – 61 – F

Patent

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Details

A61F 2/18 (2006.01) A61F 11/04 (2006.01) A61N 1/05 (2006.01) A61N 1/36 (2006.01) H04R 25/00 (2006.01)

Patent

CA 2409815

An implantable electrode array (30) that can adopt a first configuration selected to allow the array (30) to be inserted into a cochlea (12) of an implantee and at least a second configuration in which the array can apply tissue stimulation. The array (30) comprises an elongate carrier (31) having a proximal end (37), a distal end (34), and an inner surface (35) conformable with the inner wall of the implantee's cochlea (12). A plurality of electrodes (36) are supported within the carrier (31) at respective spaced locations thereon in a region between the proximal end (37) and the distal end (34) with at least one of the electrodes having a surface that is at least adjacent the inner surface (35) of the carrier (31). The carrier (31) is formed in the second configuration from a first layer (32) and at least a second layer (32) of resiliently flexible material. A method of forming an array (30) is also described.

L'invention concerne un ensemble d'électrodes implantable (30),pouvant adopter une première configuration conçue pour permettre l'insertion de cet ensemble (30) dans le limaçon osseux (12) d'un patient, ainsi qu'au moins une seconde configuration dans laquelle cet ensemble peut exercer une stimulation des tissus. L'ensemble (30) comprend un support de forme allongée (31), doté d'une extrémité proximale (37), d'une extrémité distale (34), ainsi que d'une surface intérieure (35) pouvant épouser la paroi intérieure du limaçon osseux (12) du patient. Plusieurs électrodes (36) sont soutenues par le support (31), à l'intérieur de celui-ci, au niveau d'emplacements respectifs, espacés, et situés sur ce support dans une région comprise entre l'extrémité proximale (37) et l'extrémité distale (34), l'une au moins des électrodes comprenant une surface au moins adjacente à la surface intérieure (35) du support (31). Ce support (31), dans sa seconde configuration, est formé d'une première couche (32) et d'au moins une seconde couche (32) d'un matériau à souplesse élastique. L'invention concerne également un procédé de formation d'un tel ensemble (30).

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