Leadless cardiac pacemaker with retrieval features
An implantable leadless cardiac pacing device and associated retrieval features. The implantable device includes a docking member extending from the proximal end of the housing of the implantable device including a covering surrounding at least a portion of the docking member configured to facilitate retrieval of the implantable leadless cardiac pacing device.
1. An implantable leadless cardiac pacing device comprising:
a housing having a proximal end and a distal end;
an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue; and
a docking member extending from the proximal end of the housing along a longitudinal axis of the housing, the docking member configured to facilitate retrieval of the implantable leadless cardiac pacing device;
the docking member including a head portion and a neck portion extending between the housing and the head portion;
the head portion having a radial dimension from the longitudinal axis and the neck portion having a radial dimension from the longitudinal axis less than the radial dimension of the head portion; and
a covering affixed to the docking member and surrounding at least a portion of the neck portion of the docking member;
wherein the covering is configured to remain affixed to the docking member while implanted in a patient.
2. The implantable leadless cardiac pacing device of claim 1 , wherein the covering is collapsible toward the neck portion.
3. The implantable leadless cardiac pacing device of claim 2 , wherein the covering extends from the head portion of the docking member to the proximal end of the housing.
4. The implantable leadless cardiac pacing device of claim 1 , wherein the covering has a radial dimension from the longitudinal axis greater than the radial dimension of the neck portion.
5. The implantable leadless cardiac pacing device of claim 4 , wherein the covering has a radial dimension from the longitudinal axis greater than or equal to the radial dimension of the head portion.
6. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises an electro-spun fibrous material.
7. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a synthetic sponge material.
8. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a foam material.
9. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a gel.
10. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a fabric material.
11. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a bioabsorbable material.
12. The implantable leadless cardiac pacing device of claim 1 , wherein the covering comprises a drug.
13. The implantable leadless cardiac pacing device of claim 1 , wherein the covering includes one or more retrieval features configured to direct a retrieval device into engagement with the docking member.
14. The implantable leadless cardiac pacing device of claim 13 , wherein the one or more retrieval features include one or more radially extending protrusions.
15. The implantable leadless cardiac pacing device of claim 1 , wherein the covering precludes blood coagulation or embolization around the neck portion while implanted in a patient.
16. An implantable leadless cardiac pacing device comprising:
a housing having a proximal end and a distal end;
an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue; and
a docking member extending from the proximal end of the housing along a longitudinal axis of the housing, the docking member configured to facilitate retrieval of the implantable leadless cardiac pacing device;
the docking member including a head portion and a neck portion extending between the housing and the head portion;
the head portion having a radial dimension from the longitudinal axis and the neck portion having a radial dimension from the longitudinal axis less than the radial dimension of the head portion; and
a collapsible covering located between the head portion of the docking member and the proximal end of the housing, the collapsible covering having a peripheral surface collapsible toward the neck portion when engaged with a retrieval device.
17. The implantable leadless cardiac pacing device of claim 16 , wherein the collapsible covering is collapsible toward the longitudinal axis from a first diameter at an equilibrium state to a second diameter smaller than the first diameter at a collapsed state.
18. The implantable leadless cardiac pacing device of claim 17 , wherein the second diameter is less than an outermost diameter of the head portion of the docking member.
19. An implantable leadless cardiac pacing device comprising:
a housing having a proximal end and a distal end;
an electrode positioned proximate the distal end of the housing configured to be positioned adjacent cardiac tissue; and
a docking member extending from the proximal end of the housing along a longitudinal axis of the housing, the docking member configured to facilitate retrieval of the implantable leadless cardiac pacing device;
the docking member including a head portion and a neck portion extending between the housing and the head portion;
the head portion having a radial dimension from the longitudinal axis and the neck portion having a radial dimension from the longitudinal axis less than the radial dimension of the head portion; and
a collapsible covering surrounding at least a portion of the neck portion of the docking member.