Implantable lead including a cuff for nerve stimulation
AssigneeSorin Crm SAS
InventorsVincent Callegari, Hervé Mével, Stéphane Béfahy
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Abstract
A cuff for use in nerve stimulation includes a sheet of elastomer having at least one electrode and being pre-stressed so as to allow its spiral self-winding to form a cuff around the nerve. The sheet is delimited by a first width defining an outer edge of the cuff after winding, a second width defining an opposite inner edge, a first length and a second opposite length. The first width is at both ends connected to the two lengths by a respective bevel edge forming an oblique angle relative to the direction of greatest dimension of the sheet.
Claims18
An implantable lead comprising a cuff adapted to be wound around an elongate cylindrical body such as a nerve, the cuff comprising:
- a sheet of elastically deformable material having at least one detection/stimulation electrode on a first face of the sheet;
- the sheet being pre-stressed such that it is self-winding from an initial position wherein the sheet is held under stress in a deployed state to a final position wherein the sheet is loosely spirally wound to form a sleeve around the cylindrical body, with the first face carrying the at least one electrode facing inwards;
- the sheet being delimited by a first end width, a second opposite end width, a first length joining first counterpart ends of the first and the second width, and a second opposite length joining the second homologous ends of the first and the second widths,
- wherein the first end width is connected to the first and second lengths by a first and a second respective bevel edge forming an oblique angle with respect to a direction of greatest dimension of the sheet.
An electrode cuff for nerve stimulation, comprising:
- a sheet of elastomer having a spiral bias so as to allow self-winding of the sheet into the cuff when unstressed;
- and
- an electrode on a first face of the sheet;
- wherein the sheet comprises the first face, a second face opposite the first face, a first side, a second side, a third side opposite the first side, and a fourth side opposite the second side;
- wherein a transition between the first side and the second side includes a first beveled edge, a transition between the second side and the third side includes a second beveled edge, a transition between the third side and the fourth side includes a third beveled edge, and a transition between the fourth side and the first side, includes a fourth beveled edge;
- and
- wherein the second side is chamfered between the first face and the second face, in a direction of the first face.
Dependencies are inferred from the claim text.