Stent And Stent Delivery Device

• US 20170172766A1
• Filed: 03/03/2017
• Published: 06/22/2017
• Est. Priority Date: 03/16/2012
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Lam, Cang, Tuason, Arnold, Pung, Ponaka, Tsai, Priscilla, Tieu, Tai D., Bak-Boychuk, Greg, Vong, Shirley, Soltanian, Ross, Griffith, Heather
• Granted Patent: US 10,543,113 B2
• Time in Patent Office: Days
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/885 comprising a coil including a plurality of spiral or helical sections with alternate directions around a central axis
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2002/9528 for retrieval of stents
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2230/0021 square
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0058 X-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00131 Tantalum or Ta-based alloys

Abstract

In one embodiment according to the present invention, a stent is described having a generally cylindrical body formed from a single woven nitinol wire. The distal and proximal ends of the stent include a plurality of loops, some of which include marker members used for visualizing the position of the stent. In another embodiment, the previously described stent includes an inner flow diverting layer.

Claims

1. A stent delivery device comprising:

a multi-lumen catheter containing a first lumen and a second lumen;

the first lumen providing a passage way for a guidewire;

the second lumen housing a core member;

the core member having a proximal end and a distal end where the core member is connected to a pusher on the proximal end and an anchor member on the distal end;

the anchor member releasably connected to a stent for inserting or retracting the stent, where pushing or pulling the pusher causes the anchor member to move while the multi-lumen catheter remains in a fixed position.

2. The stent delivery device of claim 1, wherein the multi-lumen catheter further comprises a third lumen connected to the anchor member and extending into the first lumen in a telescoping arrangement such that the third lumen is moveable in both directions as the core member is moved while the first lumen remains in a fixed position to provide a dedicated rapid exchange port for the guidewire.

3. The stent delivery device of claim 1 wherein the anchor member contains an elongated depression which holds the core member.

4. The stent delivery device of claim 1 wherein the anchor member includes a body that forms a backstop surface against which the stent can be pushed.

5. The stent delivery device of claim 1 wherein the anchor member includes a plurality of radially oriented posts.

6. The stent delivery device of claim 5 wherein the plurality of radially oriented posts have distal and proximal surfaces that are angled toward each other.

7. The stent delivery device of claim 5 wherein the stent includes a plurality of proximal loops and the plurality of proximal loops fit over the plurality of radially oriented posts.

8. The stent delivery device of claim 5 wherein the anchor member has three posts.

9. The stent delivery device of claim 5 wherein the plurality of radially oriented posts are fixed at equidistant intervals.

10. The stent delivery device of claim 1 wherein the anchor member sits over the third lumen.

11. A stent delivery device comprising:

a multi-lumen catheter containing a first lumen providing a passage way for a guidewire and a second lumen housing a core member, where the core member is connected to a pusher on a proximal end and an anchor member on a distal end;

the anchor member releasably connected to a stent for inserting or retracting the stent; and

a third lumen connected to the anchor member and extending into the first lumen in a telescoping arrangement such that the third lumen is moveable in both directions as the core member is moved while the first lumen remains in a fixed position to provide a dedicated rapid exchange port for the guidewire.

12. The stent delivery device of claim 11 wherein the anchor member contains an elongated depression which holds the core member.

13. The stent delivery device of claim 11 wherein the anchor member includes a body that forms a backstop surface against which the stent can be pushed.

14. The stent delivery device of claim 11 wherein the anchor member includes a plurality of radially oriented posts.

15. The stent delivery device of claim 14 wherein the anchor member has three posts fixed at equidistant radial intervals from each other.

16. The stent delivery device of claim 14 wherein the stent includes a plurality of proximal loops and the plurality of proximal loops fit over the plurality of radially oriented posts.

17. The stent delivery device of claim 11 wherein third lumen channels through the anchor member.

18. A stent delivery system for endovascular delivery of a stent comprising:

a guidewire;

a multi-lumen catheter containing a first lumen and a second lumen;

the first lumen providing a passage way for the guidewire;

the second lumen housing a core member;

the core member having a proximal end and a distal end where the core member is connected to a pusher on the proximal end and an anchor member on the distal end;

the anchor member releasably connected to the stent for inserting or retracting the stent, where pushing or pulling the pusher causes the anchor member to move while the multi-lumen catheter remains in a fixed position.

19. The stent delivery system of claim 18, wherein the multi-lumen catheter further comprises a third lumen connected to the anchor member and extending into the first lumen in a telescoping arrangement such that the third lumen is moveable in both directions as the core member is moved while the first lumen remains in a fixed position to provide a dedicated rapid exchange port for the guidewire.