Pre-curved cochlear implant electrode array

摘要

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.