Patent ID: 8364284

Claim:
A lead assembly comprising: a lead with a distal end, a proximal end, and a longitudinal length, the lead comprising a plurality of electrodes disposed at the distal end, a plurality of terminals disposed at the proximal end, at least one central lumen defined by the lead and extending along the longitudinal length of the lead from the proximal end to the distal end, a plurality of outer lumens defined by the lead and extending along the longitudinal length of the lead from the proximal end to the distal end, the plurality of outer lumens extending laterally from the at least one central lumen, wherein the plurality of outer lumens are each oval-shaped with a major axis, and a plurality of conductive wires extending along the longitudinal length of the lead, each conductive wire coupling at least one of the plurality of electrodes electrically to at least one of the plurality of terminals, wherein exactly two different conductive wires of the plurality of conductive wires are disposed in each of the plurality of outer lumens, the two different conductive wires each having an insulative coating to electrically insulate the two conductive wires from one another, and wherein each of the plurality of conductive wires has a diameter, wherein for each of the plurality of outer lumens the outer lumen has a width along the major axis that is equal to the sum of the diameters of the two conductive wires disposed in that outer lumen.