SYSTEMS AND METHODS FOR DELIVERY OF STENTS AND STENT-LIKE DEVICES

• US 20170258473A1
• Filed: 03/08/2017
• Published: 09/14/2017
• Est. Priority Date: 03/11/2016
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Sequent Medical, Inc. (Terumo Corporation)
• Inventors: PLAZA, CLAUDIO, THOMPSON, JAMES M., TRAN, HUNG P.
• Granted Patent: US 10,952,739 B2
• Time in Patent Office: Days
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/00836 corrosion-resistant A61B2017/00853 takes precedence; preventing galvanic or electrolytic corrosion in prostheses A61F2210/0009
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2210/0009 using materials or accessories for preventing galvanic or electrolytic corrosion
• CPC Class Codes: A61F 2310/00029 Cobalt-based alloys, e.g. Co-Cr alloys or Vitallium

Abstract

Systems for treating an aneurysm in a cerebral vessel and methods of use are described. In one embodiment, the system includes an elongate tubular member having a lumen, an expandable stent, and a delivery device. The expandable stent has a constrained state that is configured for delivery through the lumen of the elongate tubular member, and an expanded state configured for placement within the cerebral vessel adjacent the aneurysm. The delivery device includes an elongate member and a self-expandable portion. The proximal end of the self-expandable portion is coupled to the elongate member at or near the distal end of the elongate member. The self-expandable portion of the delivery device includes a tubular mesh structure having a constrained state and an expanded state. The stent is engaged (e.g., mechanical, frictional, or intermeshing) with the self-expandable portion of the delivery device.

Claims

1. A system for treating an aneurysm in a cerebral vessel, comprising:

an elongate tubular member having a proximal end, a distal end, and a lumen therebetween having an inner diameter d;

an expandable stent having a proximal end, a distal end, and a lumen therebetween, the expandable stent having a constrained state with an outer diameter od₁ that is configured for delivery through the lumen of the elongate tubular member, and an expanded state having an inside diameter id₂ and an outer diameter od₂, wherein the expanded state is configured for placement within the cerebral vessel adjacent the aneurysm, wherein od₂ is greater than od₁, and

a delivery device comprising an elongate member having proximal and distal ends, and a self-expandable portion having proximal and distal ends, the proximal end of the self-expandable portion coupled to the elongate member at or near the distal end of the elongate member, wherein the self-expandable portion comprises a tubular mesh structure having a constrained state with an outer diameter OD₁ that is configured for delivery through the lumen of the elongate tubular member, and an expanded state having an outer diameter OD₂,

wherein the stent is engaged with the self-expandable portion of the delivery device.

2. The system of claim 1, wherein the inside diameter id₂ of the expanded state of the stent decreases between the proximal and distal ends of the stent.

3. The system of claim 1, wherein the inside diameter id₂ of the expanded state of the stent is between about 2 mm and about 5 mm.

4. The system of claim 1, wherein the inside diameter id₂ of the expanded state of the stent is substantially the same between the proximal and distal ends of the stent.

11. The system of claim 1, wherein the stent comprises a tubular mesh.

12. The system of claim 1, wherein the stent comprises a slotted tube having a plurality of struts.

13. The system of claim 1, wherein at least part of the self-expandable portion is disposed within the lumen of the stent.

14. The system of claim 13, wherein the at least part of the self-expandable portion mechanically engages at least a portion of the stent.

15. The system of claim 13, wherein the at least part of the self-expandable portion frictionally engages at least a portion of the stent.

16. The system of claim 13, wherein the at least part of the self-expandable portion mechanically engages at least a portion of the stent through intermeshing.

17. The system of claim 13, wherein the at least part of the self-expandable portion mechanically engages the stent substantially from the proximal end to the distal end of the stent.

18. The system of claim 13, wherein the at least part of the self-expandable portion frictionally engages the stent substantially from the proximal end to the distal end of the stent.

19. The system of claim 1, wherein the tubular mesh of the self-expandable portion comprises a plurality of filaments.

20. The system of claim 19, wherein the plurality of filaments comprises a cobalt-chromium alloy.

21. The system of claim 19, wherein the plurality of filaments each have a diameter of between about 0.0010 inches and 0.0020 inches.

24. The system of claim 19, wherein the plurality of filaments are braided.

27. The system of claim 1, wherein the stent is completely self-expanding.

28. The system of claim 1, wherein the stent is partially self-expanding.

29. The system of claim 1, wherein a braid angle of the stent is different than a braid angle of the self-expandable portion.

30. The system of claim 1, wherein a braid angle of the stent is substantially similar to a braid angle of the self-expandable portion.

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