Abstract: An implantable lead includes a tubular lead body having proximal end, a distal end opposite the proximal end. A distal assembly includes an outer shell having a proximal portion and a distal portion. A tubular inner preform is disposed at least partially within the outer shell and includes a longitudinal slot extending from the distal end toward the proximal end, and a circumferential slot extending partially around a circumference of the inner preform. A coupler is disposed within the shell and includes a channel extending distally from the proximal end and an intermediate portion between the proximal and distal portions. The inner preform is coupled to the proximal portion of the coupler. A helical electrode is disposed about the distal portion of the coupler and a distal portion extends from the distal portion of the shell. A first conductor is mechanically and electrically coupled to the coupler.

Abstract: An implantable lead includes a tubular lead body having proximal end, a distal end opposite the proximal end. A distal assembly includes an outer shell having a proximal shell component and a distal shell component. A coupler is disposed within the outer shell and includes a proximal portion having a proximal end and a first channel extending distally from the proximal end, and a distal portion opposite the proximal portion. The proximal shell component is mechanically coupled to the proximal portion of the coupler by a first snap-fit connection, and the distal shell component is mechanically coupled to the proximal portion of the coupler by a second snap-fit connection. A helical electrode is disposed about the distal portion of the coupler, and extends distally from the distal portion of the shell. First and second electrical conductors extend through the lead body and are coupled to the coupler.