Detachable electrode and anchor

• US 9,308,365 B2
• Filed: 09/25/2013
• Issued: 04/12/2016
• Est. Priority Date: 11/27/2012
• Status: Active Grant

• Current Assignee: Biotronik SE & Company KG
• Original Assignee: Biotronik SE & Company KG
• Inventors: Nordstrom, Karl, Ayton, Michael J., Wenzel, Matthias
• Primary Examiner(s): Cohen, Lee S
• Application Number:
  US14/037,273
• Publication Number:
  US 20140148675A1
• Time in Patent Office: 930 Days
• Field of Search: 600/374, 600/375, 607126-128
• US Class Current: 1/1
• CPC Class Codes: A61N 1/057 Anchoring means; Means for fixing the head inside the heart
• CPC Class Codes: A61N 1/059 Anchoring means
• CPC Class Codes: A61N 1/37205 Microstimulators, e.g. implantable through a cannula
• CPC Class Codes: A61N 1/37518 Anchoring of the implants, e.g. fixation
• CPC Class Codes: A61N 1/3756 Casings with electrodes thereon, e.g. leadless stimulators

Abstract

A detachable electrode and anchor utilized with electrode leads and leadless medical implants that enable explantation of the electrode while leaving the anchor in place. The detachable electrode and anchor utilizes a detachable mechanism that detachably couples the electrode to the anchor. Embodiments do not require removal of existing scar tissue before explantation, which minimize chances of internal bleeding at the extraction site. Embodiments also minimize impact on the vein in which the electrode lead travels by eliminating use of a necessarily larger diameter sheath that is utilized around the electrode lead to remove the electrode lead and attached anchor.

Claims

1. A detachable electrode and anchor comprising:

a leadless medical implant comprising

a first detachable element, and,

an electrode comprising at least one electrically conductive element, wherein said electrode is coupled with said first detachable element;

an anchor comprising at least one projection configured to physically attach said anchor to tissue, wherein said anchor comprises a second detachable element;

wherein said first detachable element is configured to detachably engage said second detachable element to enable said anchor to remain implanted and enable said electrode to be explanted; and

,

wherein said first detachable element and said second detachable element are coupled together based on radially outward force provided by said first detachable element and radially inward force provided by said anchor,

wherein via said radially inward force provided by said anchor, said anchor imparts force on said first detachable element.

2. The detachable electrode and anchor according to claim 1, wherein

said first detachable element coupled with said electrode comprises at least one radially outward oriented projection;

and,

said second detachable element in said anchor comprises at least one radially outward oriented indentation configured to engage said at least one radially outward oriented projection.

3. The detachable electrode and anchor according to claim 1, wherein

said first detachable element coupled with said electrode comprises at least one bearing;

and,

said second detachable element in said anchor comprises an indentation configured to engage said at least one bearing.

4. The detachable electrode and anchor according to claim 3, wherein said indentation comprises a ring indentation, wherein said at least one bearing engages said ring indentation via an axial rotational coupling.

5. The detachable electrode and anchor according to claim 3, wherein said indentation comprises multiple indentations that correspond with one or more of said at least one bearing, and wherein one or more of said at least one bearing engage said multiple indentations to provide a fixed rotational relationship between said leadless medical implant and said anchor.

6. The detachable electrode and anchor according to claim 1, wherein

said first detachable element coupled with said electrode comprises a ring;

and,

said second detachable element in said anchor comprises an indentation wherein said indentation is configured to engage said ring.

7. The detachable electrode and anchor according to claim 1, wherein

first detachable element coupled with said electrode comprises at least one radially inward oriented indentation;

and,

said second detachable element in said anchor comprises a ring configured to engage said at least one radially inward oriented indentation.

8. The detachable electrode and anchor according to claim 1, wherein

said first detachable element comprises a temperature dependent hardness.

9. The detachable electrode and anchor according to claim 1, wherein

said second detachable element comprises a temperature dependent hardness.

10. The detachable electrode and anchor according to claim 1, wherein

said first detachable element and said second detachable element comprise a temperature dependent hardness.

11. The detachable electrode and anchor according to claim 1, wherein said leadless medical implant comprises a leadless pacemaker.

12. The detachable electrode and anchor according to claim 1, wherein

said first detachable element coupled with said electrode comprises at least one radially inward oriented projection;

and,

said second detachable element in said anchor comprises at least one radially inward oriented indentation configured to engage said at least one radially inward oriented projection;

wherein said at least one radially inward oriented projection is configured to radially retract to disengage from said at least one radially inward oriented indentation which reduces a force against said at least one radially inward oriented indentation via a longitudinal force applied to said detachable leadless medical implant and anchor.

13. The detachable electrode and anchor according to claim 1, wherein

said first detachable element coupled with said electrode comprises at least one radially outward oriented projection;

and,

said second detachable element in said anchor comprises at least one radially outward oriented indentation configured to engage said at least one radially outward oriented projection;

wherein said at least one radially outward oriented projection is configured to radially retract to disengage from said at least one radially outward oriented indentation which reduces a force against said at least one radially outward oriented indentation via a longitudinal force applied to said detachable leadless medical implant and anchor.