IP Library › Granted Patent US 12,268,867
Granted Patent B2
US 12,268,867 · App. 18/742,796 · Granted Apr 8, 2025

Implantable medical device fixation

Inventors: Vladimir Grubac (Brooklyn Park, MN); Matthew D. Bonner (Plymouth, MN); Raymond W. Usher (Coon Rapids, MN); Thomas A. Anderson (New Hope, MN); Arshad A. Alfoqaha (Eden Prairie, MN)
Assignee: Medtronic, Inc.
A61N1/05A61N1/0573A61N1/37518A61N1/3756
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Quick Facts
Patent No.
US 12,268,867
App. No.
18/742,796
Granted
Apr 8, 2025
Kind
B2
Abstract

Various fixation techniques for implantable medical device (IMDs) are described. In one example, an assembly comprises an IMD; and a set of active fixation tines attached to the IMD. The active fixation tines in the set are deployable from a spring-loaded position in which distal ends of the active fixation tines point away from the IMD to a hooked position in which the active fixation tines bend back towards the IMD. The active fixation tines are configured to secure the IMD to a patient tissue when deployed while the distal ends of the active fixation tines are positioned adjacent to the patient tissue.

Claims (51)

1. An assembly comprising:

an implantable medical device; and

a set of active fixation tines attached adjacent to a distal end of the implantable medical device, including a first active fixation tine;

wherein the first active fixation tine in the set is deployable from a spring-loaded position toward a hooked position;

wherein the first active fixation tine comprises a proximal end that is fixedly attached to the implantable medical device in both the spring-loaded position and the hooked position;

wherein the first active fixation tine is configured to help secure the implantable medical device to a patient tissue when the first active fixation tine is deployed toward the hooked position;

wherein the first active fixation tine is configured to deploy from the spring-loaded position toward the hooked position in response to releasing the first active fixation tine from the spring-loaded position and allowing the first active fixation tine to bend toward the hooked position;

wherein the implantable medical device includes a first electrode;

wherein the active fixation tines are positioned substantially equidistant from each other at the distal end of the implantable medical device, and extend distally from the distal end of the implantable medical device;

wherein the first electrode is located on the distal end of the implantable medical device, between and radially inward of the active fixation tines, wherein the implantable medical device is configured such that the first electrode electrically contacts the patient tissue when the implantable medical device is secured to the patient tissue.

2. The assembly of claim 1 , wherein each active fixation tine of the set of active fixation tines is deployable from the spring-loaded position toward the hooked position, and each active fixation tine of the set of active fixation tines comprises a proximal end that is fixedly attached to the implantable medical device in both the spring-loaded position and the hooked position.

3. The assembly of claim 1 , wherein, in the hooked position, the first active fixation tine extends distally from the distal end of the implantable medical device and bends radially away from the implantable medical device, toward a free end of the first active fixation tine.

4. The assembly of claim 3 , wherein, in the hooked position, the first active fixation tine bends to orient a portion of the first active fixation tine to point generally in the proximal direction.

5. The assembly of claim 1 , wherein the implantable medical device further comprises pacing circuitry configured to deliver cardiac pacing using the first electrode.

6. The assembly of claim 1 , wherein, in the spring-loaded position, the distal end of the active fixation tine points away from the implantable medical device.

7. The assembly of claim 1 , wherein, in the spring-loaded position, the distal end of the active fixation tine is located distal of the implantable medical device.

8. The assembly of claim 1 ,

wherein the set of active fixation tines is the sole fixation component of the assembly;

wherein each active fixation tine of the set of active fixation tines is deployable from the spring-loaded position toward the hooked position; and

wherein all of the active fixation tines of the set extend from their respective proximal ends, distally then radially away from the first electrode when in the hooked position.

9. The assembly of claim 8 , wherein the first electrode is located at a distal tip of the implantable medical device.

10. A kit for implanting a leadless pacemaker within a patient, the kit comprising:

the leadless pacemaker;

a set of active fixation tines attached to the leadless pacemaker adjacent a distal end of the leadless pacemaker, wherein a first active fixation tine of the set of active fixation tines is configured to be deployed from a spring-loaded position toward a hooked position;

wherein the active fixation tines are positioned substantially equidistant from each other at the distal end of the leadless pacemaker, and extend distally from the distal end of the leadless pacemaker;

wherein each active fixation tine of the set of active fixation tines is deployable from the spring-loaded position toward the hooked position, and each active fixation tine of the set of active fixation tines comprises a proximal end that is fixedly attached to the leadless pacemaker in both the spring-loaded position and the hooked position;

a catheter forming a lumen sized to receive the leadless pacemaker and hold each active fixation tine of the set of active fixation tines in the spring-loaded position; and

a deployment element configured to initiate deployment of at least the first active fixation tine of the set of active fixation tines while the leadless pacemaker is positioned within the lumen of the catheter such that at least a portion of the first active fixation tine is adjacent the distal end of the catheter,

wherein the set of active fixation tines is configured such that the deployment of at least the first active fixation tine of the set of active fixation tines from the spring-loaded position toward the hooked position helps secure the leadless pacemaker to patient tissue.

11. The kit of claim 10 , wherein, in the hooked position, the first active fixation tine extends distally from the distal end of the leadless pacemaker and bends radially away from the leadless pacemaker, toward a free end of the first active fixation tine.

12. The kit of claim 11 , wherein, in the hooked position, the first active fixation tine bends to orient a portion of the first active fixation tine to point generally in the proximal direction.

13. The kit of claim 10 , wherein, in the spring-loaded position, the distal end of the active fixation tine is located distal of the leadless pacemaker.

14. The kit of claim 10 ,

wherein the set of active fixation tines is the sole fixation component of the leadless pacemaker;

wherein each active fixation tine of the set of active fixation tines is deployable from the spring-loaded position toward the hooked position; and

wherein all of the active fixation tines of the set extend from their respective proximal ends, distally then radially away from the first electrode when in the hooked position.

15. A kit for implanting a leadless pacemaker within a patient, the kit comprising:

the leadless pacemaker, wherein the leadless pacemaker has a distal end face and a first electrode on the distal end face;

a set of active fixation tines attached to the leadless pacemaker, the active fixation tines configured to have a spring-loaded position for advancement of the leadless pacemaker toward a deployment location, and a relaxed position in which the active fixation tines have a hooked configuration;

wherein the active fixation tines are positioned substantially equidistant from each other at the distal end of the leadless pacemaker, near a periphery of the distal end face and radially outward of the first electrode;

wherein the active fixation tines extend distally from the distal end face of the leadless pacemaker where they emerge from the distal end face;

wherein respective proximal ends of the active fixation tines are fixedly attached to the leadless pacemaker in both the spring-loaded position and the relaxed position;

a catheter forming a lumen sized to receive the leadless pacemaker and hold each active fixation tine of the set of active fixation tines in the spring-loaded position; and

a deployment element configured to initiate deployment of the leadless pacemaker and the tines by pushing the leadless pacemaker and the tines together, distally, toward a distal end opening of the catheter;

wherein, when in the spring-loaded position in the catheter, respective distal ends of the active fixation tines are positioned distal of the leadless pacemaker, so as to exit the catheter before the leadless pacemaker as the leadless pacemaker is advanced distally from the catheter during the process of deployment.

16. The kit of claim 15 , wherein respective distal tips of the active fixation tines are configured to pierce cardiac tissue during deployment.

17. The kit of claim 15 , wherein, in the relaxed position and along their length proceeding away from their respective fixed proximal ends, the active fixation tines bend radially away from the leadless pacemaker, after they extend distally from the distal end face of the leadless pacemaker.

18. The kit of claim 17 , wherein, in the relaxed position, the active fixation tines bend to orient respective portions of the tines to point generally in the proximal direction.

19. The kit of claim 15 , wherein the leadless pacemaker further comprises pacing circuitry configured to deliver cardiac pacing using the first electrode.

20. The kit of claim 15 , wherein, in the spring-loaded position, respective distal ends of the active fixation tine point away from the leadless pacemaker.

21. The kit of claim 15 , wherein the first electrode is located at a distal tip of the leadless pacemaker.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 13, 2024
From: GRUBAC, VLADIMIR; BONNER, MATTHEW D.; USHER, RAYMOND W.; ANDERSON, THOMAS A.; ALFOQAHA, ARSHAD A.
To: MEDTRONIC, INC.
Reel/Frame 067722/0013 →
Continuity (7)
Continuation 17099401 · Nov 16, 2020
Continuation 16169276 · Oct 24, 2018
Continuation 15809579 · Nov 10, 2017
Continuation 14193306 · Feb 28, 2014
Continuation 13096881 · Apr 28, 2011
Provisional Application 61428067 · Dec 29, 2010
Related Publication 20240325730A1 · Oct 3, 2024
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