Strain-relief/lead assembly electrically and mechanically connected to an active medical device

An active medical device (AMD), comprising:

• a) a device housing containing an electrical power source connected to a printed circuit board supporting at least one electronic component;
• and
• b) a feedthrough welded into an opening in the device housing, the feedthrough comprising:
• i) a ferrule defining a ferrule opening extending to a ferrule device side end surface and a ferrule body fluid side end surface, wherein the ferrule has an inner annular surface defining the ferrule opening, the inner annular surface having an inner annular groove;
• ii) an insulator hermetically sealed to the ferrule in the ferrule opening, the insulator extending to an insulator device side residing at or adjacent to the ferrule device side end surface, and the insulator extending to an insulator body fluid side residing adjacent to the ferrule body fluid side end surface;
• iii) at least a first terminal pin and a second terminal pin supported by the insulator, wherein the first and second terminal pins each have a device side portion extending outwardly beyond the device side of the insulator and a body fluid side portion extending outwardly beyond the body fluid side of the insulator;
• iv) an O-ring received in the inner annular groove, wherein the O-ring resides between the insulator body fluid side and the ferrule body fluid side end surface;
• and
• v) a pair of first and second spaced-apart arms that extend distally from the body fluid side end surface of the ferrule, the first and second arms having inwardly extending first and second detents.

An active medical device (AMD), comprising:

• a) a device housing containing an electrical power source connected to a printed circuit board supporting at least one electronic component;
• and
• b) a feedthrough welded into an opening in the device housing, the feedthrough comprising:
• i) a ferrule defining a ferrule opening extending along a longitudinal axis to a ferrule device side end surface and a ferrule body fluid side end surface, wherein at least the ferrule device side end surface resides along an imaginary device side plane aligned perpendicular to the longitudinal axis, and wherein the ferrule has an oval shape so that in a plan view looking at the ferrule device side end surface, opposed ferrule first and second longitudinal sidewalls extend to opposed ferrule third and fourth curved end walls;
• ii) an insulator hermetically sealed to the ferrule in the ferrule opening, wherein the insulator comprises opposed insulator first and second longitudinal sidewalls that extend to opposed insulator third and fourth curved end walls, and wherein the insulator sealed to the ferrule in the ferrule opening extends to an insulator device side residing at or adjacent to the ferrule device side end surface, and the insulator extending to an insulator body fluid side residing adjacent to the ferrule body fluid side end surface;
• iii) at least a first terminal pin and a second terminal pin supported by the insulator, wherein the first and second terminal pins each have a device side portion extending outwardly beyond the device side of the insulator and a body fluid side portion extending outwardly beyond the body fluid side of the insulator;
• and
• iv) a pair of first and second spaced-apart arms that extend distally from the respective ferrule third and fourth curved end walls at the body fluid side end surface of the ferrule, wherein the first and second arms are spaced apart by the opposed ferrule first and second longitudinal sidewalls and comprise respective first and second arm inner walls that extend perpendicularly from the ferrule body fluid side end surface aligned along the imaginary device side plane to respective distal, inwardly extending first and second detents so that an inner apex of the first and second detents is spaced closer to the longitudinal axis than the respective perpendicularly-oriented first and second arm inner walls.