Leadless pacemaker having attachment feature

Patent metadata

Field	Value
Publication number	US-12005262-B2
Application number	US-202117493731-A
Country	US
Kind code	B2
Filing date	Oct 4, 2021
Priority date	Mar 9, 2018
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A leadless biostimulator including an attachment feature to facilitate precise manipulation during delivery or retrieval is described. The attachment feature can be monolithically formed from a rigid material, and includes a base, a button, and a stem interconnecting the base to the button. The stem is a single post having a transverse profile extending around a central axis. The transverse profile can be annular and can surround the central axis. The leadless biostimulator includes a battery assembly having a cell can that includes an end boss. A tether recess in the end boss is axially aligned with a face port in the button to receive tethers of a delivery or retrieval system through an inner lumen of the stem. The attachment feature can be mounted on and welded to the cell can at a thickened transition region around the end boss. Other embodiments are also described and claimed.

First claim

What is claimed is:

1. A battery assembly for a leadless biostimulator, comprising:
an electrolyte; and
a cell can containing the electrolyte, wherein the cell can includes an annular wall extending proximally along a central axis, and an end boss extending from the annular wall to a proximal face, wherein an outer surface of the end boss has a smaller diameter than the annular wall, wherein the end boss includes a frustoconical surface tapering radially inward from the outer surface to the proximal face, and wherein the end boss includes a tether recess extending into the proximal face along the central axis.

2. The battery assembly of claim 1 , wherein the cell can includes a transition region between the annular wall and the end boss, and wherein a wall thickness of the annular wall is less than a transition thickness of the transition region.

3. The battery assembly of claim 1 , wherein the outer surface extends longitudinally from the annular wall.

4. The battery assembly of claim 1 further comprising a separator containing the electrolyte, wherein an inner surface of the annular wall is in contact with the separator.

5. The battery assembly of claim 4 , wherein the separator includes a bag.

6. The battery assembly of claim 1 , wherein the cell can extends proximally from a distal battery end to a proximal battery end, wherein the end boss is at the proximal battery end, and further comprising one or more terminals at the distal battery end.

7. The battery assembly of claim 1 , wherein the proximal face of the end boss is orthogonal to the central axis.

8. The battery assembly of claim 1 , wherein the tether recess is surrounded by an inner recess surface extending from the proximal face to a recess bottom, and wherein a proximal diameter of the inner recess surface at the proximal face is equal to or larger than a distal diameter of the inner recess surface at the recess bottom.

9. The battery assembly of claim 8 , wherein the inner recess surface is cylindrical.

10. The battery assembly of claim 8 , wherein the inner recess surface is tapered.

11. The battery assembly of claim 8 further comprising a transitional edge between the proximal face and the inner recess surface.

12. A leadless biostimulator comprising:
a battery assembly including a cell can containing an electrolyte, wherein the cell can includes an annular wall extending proximally along a central axis, and an end boss extending from the annular wall to a proximal face, wherein an outer surface of the end boss has a smaller diameter than the annular wall, wherein the end boss includes a frustoconical surface tapering radially inward from the outer surface to the proximal face, and wherein the end boss includes a tether recess extending into the proximal face along the central axis; and
an attachment feature mounted on the cell can, wherein the attachment feature includes a button having a face port axially aligned with the tether recess.

13. The leadless biostimulator of claim 12 , wherein the cell can includes a transition region between the annular wall and the end boss, and wherein a wall thickness of the annular wall is less than a transition thickness of the transition region.

14. The leadless biostimulator of claim 12 , wherein the outer surface extends longitudinally from the annular wall.

15. The leadless biostimulator of claim 12 , wherein the attachment feature includes a stem between the button and the end boss, and wherein the stem has a transverse profile extending around the central axis.

16. The leadless biostimulator of claim 15 , wherein the attachment feature is monolithically formed from a rigid material, and wherein the stem is a single post.

17. The leadless biostimulator of claim 15 , wherein the attachment feature includes an internal cavity extending from the face port through the stem, and wherein the internal cavity receives the end boss of the cell can.

18. The leadless biostimulator claim 17 , wherein the transverse profile of the stem is annular and has an inner lumen axially aligned with the face port and the tether recess.

19. The leadless biostimulator of claim 12 , wherein the attachment feature includes a distal flange coupled to the cell can by a weld at a transition region between the annular wall and the end boss.

20. The leadless biostimulator of claim 19 , wherein the weld extends around a circumference of the cell can.

Assignees

• Pacesetter Inc

Inventors

• Eby Thomas B
• James Iv Benjamin F
• Sahabi Kavous
• Lieber Travis
• Garabed Arees
• Mar Craig E
• Orts Sondra
• Strang Tyler J
• Heisel Jennifer
• Arnar Bernhard
• Coyle Daniel
• Goodman Daniel
• Smith Scott
• Kerns Scott
• Rickheim David
• Weber Adam
• Sacha Mike
• Chun Byron Liehwah

Classifications

• A61M2210/125

  Heart · CPC title

• A61B2017/00969

  used for transplantation · CPC title

• H01M50/244

  Secondary casings; Racks; Suspension devices; Carrying devices; Holders characterised by their mounting method · CPC title

• H01M50/247

  specially adapted for portable devices, e.g. mobile phones, computers, hand tools or pacemakers · CPC title

• A61B17/00

  Surgical instruments, devices or methods (A61B18/00 takes precedence; dental tools A61C3/00; eye surgery A61F9/007; ear surgery A61F11/20) · CPC title