DEVICE FOR PREVENTING CLOT MIGRATION FROM LEFT ATRIAL APPENDAGE

• US 20110208233A1
• Filed: 01/19/2011
• Published: 08/25/2011
• Est. Priority Date: 01/22/2004
• Status: Abandoned Application

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc), REX Medical LP
• Original Assignee: REX Medical LP
• Inventors: McGuckin, James F. JR., Bressler, James Erich
• Application Number:
  US13/008,990
• Publication Number:
  US 20110208233A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12031 complete occlusion
• CPC Class Codes: A61B 17/12122 within the heart for closing a cardiac septal defect A61B17/0057
• CPC Class Codes: A61B 17/12145 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/1215 comprising additional materials, e.g. thrombogenic, having filaments, having fibers, being coated
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 17/12177 comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• CPC Class Codes: A61B 17/12195 comprising a curable material
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00579 Barbed implements
• CPC Class Codes: A61B 2017/00592 Elastic or resilient implements
• CPC Class Codes: A61B 2017/00597 Implements comprising a membrane
• CPC Class Codes: A61B 2017/00632 Occluding a cavity, i.e. closing a blind opening
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61B 2017/12054 Details concerning the detachment of the occluding device from the introduction device

Abstract

A device for placement within the left atrial appendage of a patient comprising a retention member and a material positioned within the retention member and unattached thereto. The retention member has a first elongated configuration for delivery and a second expanded configuration for placement within the left atrial appendage. The material is configured to float within the retention member. The retention member can have at least one appendage wall engagement member to secure the retention member to the appendage.

Claims

1. A device for placement in the left atrial appendage of a patient comprising a retention member having a first elongated configuration for delivery and a second expanded configuration for placement within the left atrial appendage, a material positioned within the retention member and unattached thereto for floating movement therein, in the expanded configuration of the retention member, the retention member having a larger transverse dimension, the retention member having at least one appendage wall engagement member to secure the retention member to the appendage.

2. The device of claim 1, wherein the retention member is composed of a shape memory material, and in the expanded configuration the retention member moves toward a shape memory position.

3. The device of claim 1, wherein the material comprises a mesh.

4. The device of claim 1, wherein the material comprises a plurality of intertwined fibers.

5. The device of claim 1 wherein the material comprises a plurality of intertwined ribbons.

6. The device of claim 1, wherein the retention member has a plurality of struts defining a space therebetween and the material floats freely within the space.

7. The device of claim 1, wherein the engagement member includes a plurality of teeth.

8. The device of claim 1, wherein the retention member has a plurality of struts and the struts terminate in the engagement members.

9. The device of claim 1, wherein the retention member comprises a wound wire.

10. A device for placement in the left atrial appendage comprising a tube laser cut to form a series of struts, the tube having a first elongated configuration for delivery and a second expanded configuration for placement, the struts extending outwardly so that a distal region of the struts has a greater dimension than a proximal region, the struts defining a space therebetween, a material non attachably positioned within the space defined by the struts and floating therein for causing blood clots within the appendage.

11. The device of claim 10, wherein the material comprises a mesh.

12. The device of claim 10, wherein the material comprises a plurality of intertwined fibers.

13. The device of claim 10, wherein the material comprises a plurality of intertwined ribbons.

14. The device of claim 10, wherein the struts are composed of shape memory material.

15. The device of claim 10, wherein the material is positionable within the space defined by the struts subsequent to placement of the struts in the appendage.

16. A method for blocking blood clot migration from a left atrial appendage comprising the steps of:

inserting into the left atrial appendage a sheath containing a device including a retention member having a plurality of struts in a reduced profile position;

exposing the retention member from the sheath to enable it to expand to engage a wall of the left atrial appendage;

subsequently inserting a material in situ within a space between the plurality of struts for floating movement therein; and

withdrawing the sheath to leave the retention member in the left atrial appendage so the material floats within the space within the retention member, the device causing blood clots in the appendage.

17. The method of claim 16, wherein the retention member has a plurality of shape memory struts and the step of exposing the retention member enables the struts to move toward a shape memorized position.

18. The method of claim 16, wherein the retention member has appendage engaging members to secure the retention member within the appendage.

19. The method of claim 16, wherein the material is a mesh.

20. The method of claim 16, wherein the material is one of the intertwined ribbons or fibers.