Fixation component for multi-electrode implantable medical device

An implantable medical device (IMD), comprising:

• a housing extending along a longitudinal axis from a proximal end to a distal end;
• an elongate leadlet mounted in proximity to the distal end of the housing and extending distally from the housing, wherein a distal end of the leadlet comprises a first electrode;
• a second electrode mounted in proximity to the distal end of the housing;
• a fixation component comprising:
• a base defining a longitudinal axis of the fixation component, wherein the base is fixedly attached to the IMD having a proximal end and a distal end aligned along the longitudinal axis;
• and
• a plurality of tines extending from the base and being spaced apart from one another, the plurality of tines comprising:
• a penetrator tine comprising:
• a proximal section of the penetrator tine fixedly attached to the base and extending from the base in a first direction;
• a curved section of the penetrator tine defining a deformable preset curvature of the penetrator tine and extending laterally from the proximal section of the penetrator tine and traversing the longitudinal axis;
• and
• a distal section of the penetrator tine 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 form a puncture;
• and
• a protector tine comprising:
• a proximal section of the protector tine fixedly attached to the base and extending from the base in the first direction;
• a curved section of the protector tine extending from the proximal section of the protector tine laterally, outward from the longitudinal axis;
• and
• a distal section of the protector tine extending from the curved section of the protector tine and terminating in a non-incisive distal end,
• wherein the distal section of the protector tine is configured to,
• when in a deformed configuration, urge the leadlet toward the penetrator tine.

A medical device system comprising:

• an implantable medical device (IMD) comprising:
• a housing extending along a longitudinal axis from a proximal end to a distal end;
• an elongate leadlet mounted in proximity to the distal end of the housing and extending distally from the housing, wherein a distal end of the leadlet comprises a first electrode;
• a second electrode mounted in proximity to the distal end of the housing;
• and
• a fixation component comprising a base in proximity to the distal end of the housing and a plurality of tines fixedly attached spaced from one another around a perimeter of the distal end of the housing;
• and
• a delivery tool comprising a tubular sidewall that defines a lumen into which the IMD may be loaded, wherein the lumen having a distal opening through which the IMD may be deployed,
• wherein the plurality of tines comprises:
• a penetrator tine comprising:
• a proximal section of the penetrator tine fixedly attached to the base and extending from the base in a first direction;
• a curved section of the penetrator tine defining a deformable preset curvature of the penetrator tine and extending laterally from the proximal section of the penetrator tine and traversing the longitudinal axis;
• and
• a distal section of the penetrator tine 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 form a puncture;
• and
• a protector tine comprising:
• a proximal section of the protector tine fixedly attached to the base and extending from the base in the first direction;
• a curved section of the protector tine extending from the proximal section of the protector tine laterally, outward from the longitudinal axis;
• and
• a distal section of the protector tine extending from the curved section of the protector tine and terminating in a non-incisive distal end,
• wherein the distal section of the protector tine is configured to, when in a deformed configuration, urge the leadlet toward the penetrator tine.

A method of forming a fixation component for an IMD comprising:

• forming a base defining a longitudinal axis of the fixation component;
• and
• forming a plurality of tines extending from the base and being spaced apart from one another, the plurality of tines comprising:
• a penetrator tine comprising:
• a proximal section of the penetrator tine fixedly attached to the base and extending from the base in a first direction;
• a curved section of the penetrator tine defining a deformable preset curvature of the penetrator tine and extending laterally from the proximal section of the penetrator tine and traversing the longitudinal axis;
• and
• a distal section of the penetrator tine 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 form a puncture;
• and
• a protector tine comprising:
• a proximal section of the protector tine fixedly attached to the base and extending from the base in the first direction;
• a curved section of the protector tine extending from the proximal section of the protector tine laterally, outward from the longitudinal axis;
• and
• a distal section of the protector tine extending from the curved section of the protector tine and terminating in a non-incisive distal end,
• wherein the distal section of the protector tine is configured to, when in a deformed configuration, urge a leadlet of the IMD toward the penetrator tine.