Implantable cuff, method of manufacture, and method of installation

An implantable cuff for encircling a nerve trunk or other internal body tissue, the implantable cuff comprising:

• a generally flat self-curling sheet defining:
• (i) a first layer and a second layer, the first layer being resiliently extensible, the second layer being bonded to the first layer such that it tends to hold an interface therebetween extended, whereby resilient contractive forces of the first layer bias the sheet to curl,
• the sheet being self-biased to curl around an axis extending longitudinally generally parallel to the first edge into a spiral with the first layer in part defining an interior periphery of an axial passage therethrough and the second planar surface in part defining an exterior periphery;
• a conductive segment disposed on the first layer surface adjacent the first edge.

An implantable cuff for encircling a nerve trunk or other internal body tissue, the implantable cuff comprising:

• a generally flat sheet of non-conductive material, the sheet defining:
• (i) first and second generally planar surfaces on opposite faces thereof,
• (ii) first and second oppositely disposed edges,
• (iii) first and second oppositely disposed ends,
• (iv) a cut out portion adjacent an intersection between the first end and the first edge,
• the sheet being self-biased to curl around an axis extending longitudinally generally parallel to the first edge into a spiral with the first edge within the spiral and the first planar surface in part defining an interior periphery of an axial passage therethrough with the second edge outside of the spiral and the second planar surface in part defining an exterior periphery such that as the sheet curls, the cut out region defines an enlarged portion of the axial passage;
• and,
• a conductive segment disposed on the first planar surface adjacent the first edge.

An implantable cuff for infusing medication into encircled internal body tissue, the implantable cuff comprising:

• a generally flat sheet of material, the sheet defining:
• (i) first and second generally planar surfaces on opposite faces thereof,
• (ii) first and second oppositely disposed edges,
• the sheet being self-biased to curl around an axis extending longitudinally generally parallel to the first edge into a spiral with the first edge within the spiral and the first planar surface in part defining an interior periphery of an axial passage therethrough and with the second edge outside of the spiral and the second planar surface in part defining an exterior periphery;
• and,
• a medication conductive segment disposed on the first planar surface adjacent the first edge for conducting medications therethrough for infusion into the encircled body tissue.