Abstract: An extensible implantable electrical lead includes a lead body having a proximal end and a distal end. The lead body is formed of a polymeric material that is extensible between a first length and a second length. A plurality of electrical conductors are disposed within the lead body and extend between the proximal end and the distal end. The plurality of electrical conductors are each electrically insulated from each other and form co-axial coils between the proximal end and the distal end. The co-axial coils include an outer coil disposed about an inner coil. The inner coil has a first plurality of electrical conductors that are electrically insulated and separated from each other and have a first coil diameter. The outer coil includes a second plurality of electrical conductors that are electrically insulated and separated from each other and have a second coil diameter. The second coil diameter is greater than the first coil diameter, and the first plurality is a number less than the second plurality.

Abstract: An extensible implantable electrical lead includes a lead body having a proximal region and a distal region. The lead body is formed of a polymeric material that is extensible between a first length and a second length. A first plurality of electrical conductors are disposed within the lead body and extend between the proximal region and the distal region. The first plurality of electrical conductors are each electrically insulated and spaced apart from each other and form a side-by-side co-planar first sigmoidal pattern between the proximal region and the distal region.

Abstract: An extensible implantable electrical lead includes a lead body having a proximal end and a distal end. The lead body is formed of a polymeric material that is extensible between a first length and a second length. A plurality of electrical conductors are disposed within the lead body and extend between the proximal end and the distal end. The plurality of electrical conductors are each electrically insulated from each other and form co-axial coils between the proximal end and the distal end. The co-axial coils include an outer coil disposed about an inner coil. The inner coil has a first plurality of electrical conductors that are electrically insulated and separated from each other and have a first coil diameter. The outer coil includes a second plurality of electrical conductors that are electrically insulated and separated from each other and have a second coil diameter. The second coil diameter is greater than the first coil diameter, and the first plurality is a number less than the second plurality.

Abstract: An extensible implantable electrical lead includes a lead body having a proximal region and a distal region. The lead body is formed of a polymeric material that is extensible between a first length and a second length. A first plurality of electrical conductors are disposed within the lead body and extend between the proximal region and the distal region. The first plurality of electrical conductors are each electrically insulated and spaced apart from each other and form a side-by-side co-planar first sigmoidal pattern between the proximal region and the distal region.