Implantable medical device including a tine housing

An implantable medical device comprising:

• an elongated housing defining a longitudinal axis, wherein the longitudinal axis extends from a proximal end of the elongated housing to a distal end of the elongated housing;
• a mounting structure attached to the distal end of the elongated housing, wherein the mounting structure comprises one or more locking tabs around the longitudinal axis;
• a tine housing at least partially surrounding the mounting structure, the tine housing comprising an adhesive fill port and one or more tines extending from the tine housing, and the tine housing configured to receive the one or more locking tabs,
• wherein the one or more locking tabs are configured to limit motion of the tine housing parallel to the longitudinal axis when the tine housing receives the one or more locking tabs,
• wherein the tine housing and the mounting structure form an inner chamber bounded at least in part by the distal end of the elongated housing, the mounting structure, and the tine housing when the tine housing receives the one or more locking tabs, and
• wherein the adhesive fill port extends through the tine housing and opens into an open space defined by the inner chamber when the tine housing receives the one or more locking tabs, the open space extending from the mounting structure to a portion of the tine housing and the open space further extending to the distal end of the elongated housing;
• an electrode supported by the tine housing and positioned outside of the inner chamber;
• a feedthrough pin extending from the distal end of the elongated housing, through the portion of the tine housing, and through the open space, wherein the mounting structure at least partially surrounds the feedthrough pin, and wherein the feedthrough pin is electrically connected to the electrode;
• and
• an adhesive filling the open space, wherein the adhesive defines a contiguous mass in contact with the distal end of the elongated housing, the mounting structure, the tine housing, and the feedthrough pin.