An implant assembly (14), comprising: an elongated pusher member (18) having a proximal end (24) and a distal end (26), the pusher member including a stiffening member (80) and a first and a second electrically conductive sheath, each disposed over the stiffening member； an implantable device mounted to the distal end of the pusher member； an electrolytically severable joint (20) disposed on the pusher member, wherein the implantable device detaches from the pusher member when the severable joint is severed； a return electrode (86) disposed on the distal end of the pusher member； a first terminal (28) disposed on the proximal end of the pusher member, wherein a first electrically conductive path extends between the first terminal and the severable joint, the first electrically conductive path including the first electrically conductive sheath； and a second terminal (30) disposed on the proximal end of the pusher member, wherein a second electrically conductive path extends between the second terminal and the return electrode, the second electrically conductive path including the second electrically conductive sheath.
