Leadless cardiac pacemaker with retrieval features

• US 9,795,781 B2
• Filed: 04/28/2015
• Issued: 10/24/2017
• Est. Priority Date: 04/29/2014
• Status: Active Grant

• Current Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Original Assignee: Cardiac Pacemakers Incorporated (Boston Scientific Corporation)
• Inventors: Schmidt, Brian L., Haasl, Benjamin J., Edgell, John M., Sachs, Dana
• Primary Examiner(s): PATTON, AMANDA K
• Application Number:
  US14/698,490
• Publication Number:
  US 20150306381A1
• Time in Patent Office: 910 Days
• CPC Class Codes: A61B 17/50 Instruments, other than pincettes or toothpicks, for removing foreign bodies from the human body locating otherwise A61B5/06; locating by radiation A61B6/00; removing calculi A61B17/22; from the eyes A61F9/00709
• CPC Class Codes: A61N 1/0587 Epicardial electrode systems; Endocardial electrodes piercing the pericardium
• CPC Class Codes: A61N 1/37512 Pacemakers
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators
• CPC Class Codes: A61N 2001/0578 having means for removal or extraction

Abstract

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.

Claims

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.