Structures and techniques for medical lead fabrication

A method comprising:

• disposing conductors within a spline, the spline extending from a spline first end to a spline second end, the spline defining a plurality of walls extending radially outward from a central portion of the spline at different circumferential locations, wherein each wall of the plurality of walls has a radially outward free end, wherein adjacent walls of the plurality of walls define conductor channels therebetween, wherein the central portion of the spline defines a stylet lumen, and wherein conductors extend from a conductor first end to a conductor second end and have a conductor intermediate portion therebetween, wherein disposing the conductors includes disposing the conductor first end of the conductors within the conductor channels;
• electrically coupling a first set of contacts with the conductors at the conductor first end;
• disposing the conductor second end of each of the plurality of conductors through respective apertures of the second set of contacts;
• electrically coupling each of the plurality of conductors with the respective second set of contacts;
• and
• disposing an outer lead body over the conductors.

A lead assembly comprising:

• a plurality of conductors, each conductor of the plurality of conductors comprising a conductor first end, a conductor second end, and a conductor intermediate portion therebetween;
• a spline extending from a spline first end to a spline second end, the spline defining a plurality of walls extending radially outward from a central portion of the spline at different circumferential locations, wherein each wall of the plurality of walls has a radially outward free end, wherein adjacent walls of the plurality of walls define conductor channels therebetween, wherein the central portion of the spline defines a stylet lumen, and wherein the conductor first end of each conductor of the plurality of conductors is disposed within respective conductor channels of the conductor channels;
• a first set of contacts electrically coupled with respective conductors of the plurality of conductors at the conductor first end;
• a second set of contacts electrically coupled with respective conductors of the plurality of conductors at the conductor second end, the second set of contacts comprising a plurality of inserts defining a plurality of apertures through which the second end of respective conductors are disposed;
• a first tubing disposed around the plurality of conductors at a portion of the conductor intermediate portion, the first tubing disposed between the conductor and the outer lead body;
• a second tubing disposed around the spline second end and a portion of the plurality of the conductors extending away from the spline second end;
• and
• an outer lead body disposed over at least the intermediate portion of the plurality of conductors.