Fixation component for multi-electrode implantable medical device

A medical device system comprising:

• an implantable medical device (IMD), comprising:
• a body extending from a proximal portion to a distal portion along a longitudinal axis;
• an elongate leadlet extending from a proximal end of the elongate leadlet mounted in proximity to a distal end of the body to a distal end of the elongate leadlet, wherein the distal end of the elongate leadlet comprises an electrode;
• a return electrode on the body of the IMD;
• a fixation component comprising:
• a base having a proximal end and a distal end aligned along the longitudinal axis, wherein the proximal end of the base is attached to the distal portion of the body;
• and
• a penetrator tine comprising:
• a proximal section attached to and extending from the distal end of the base in a first direction;
• a curved section defining a deformable preset curvature of the penetrator tine and extending in a second direction laterally from the proximal section of the penetrator tine and traversing the longitudinal axis;
• and
• a distal section extending from the curved section of the penetrator tine and terminating in an incisive distal end, wherein the incisive distal end is configured to penetrate a tissue to fix the IMD to the tissue;
• and
• an electrode interface assembly comprising:
• a proximal section defining a proximal end attached to and extending distally from the distal portion of the body along the longitudinal axis;
• and
• a distal section extending from the proximal end of the electrode interface assembly and defining a non-incisive distal end, wherein the non-incisive distal end of the electrode interface assembly is configured to contact the tissue to control a depth of tissue penetration of the penetrator tine;
• and
• a delivery tool comprising a tubular sidewall that defines a lumen configured to receive the IMD, wherein the lumen has a distal opening through which the IMD may be deployed.

A method of forming an IMD comprising:

• forming a body of the IMD, wherein the body extends from a proximal portion to a distal portion along a longitudinal axis;
• attaching an electrode interface assembly to the distal portion of the body, wherein the electrode interface assembly is formed separated from the body, and wherein the electrode interface assembly comprises:
• a proximal section defining a proximal end attached to and extending distally from the distal portion of the body along the longitudinal axis;
• and
• a distal section extending from the proximal section of the electrode interface assembly and defining a non-incisive distal end;
• attaching a fixation component to the distal portion of the body, wherein the fixation component comprises:
• a base having a proximal end and a distal end aligned along the longitudinal axis, wherein the proximal end of the base is attached to the distal portion of the body;
• and
• a penetrator tine comprising:
• a proximal section attached to and extending from the distal end of the base in a first direction;
• a curved section defining a deformable preset curvature of the penetrator tine and extending in a second direction laterally from the proximal section of the penetrator tine and traversing the longitudinal axis;
• and
• a distal section extending from the curved section of the penetrator tine and terminating in an incisive distal end, wherein the incisive distal end is configured to penetrate a tissue to fix the IMD to the tissue,
• wherein the non-incisive distal end of the electrode interface assembly is configured to contact the tissue to control a depth of tissue penetration of the penetrator tine.