Stent and stent delivery device

• US 10,543,113 B2
• Filed: 03/03/2017
• Issued: 01/28/2020
• Est. Priority Date: 03/16/2012
• Status: Active Grant

• Current Assignee: Terumo Corporation
• Original Assignee: Terumo Corporation
• Inventors: Vong, Shirley, Tsai, Priscilla, Lam, Cang, Soltanian, Ross, Bak-Boychuk, Greg, Tieu, Tai D., Pung, Ponaka, Tuason, Arnold, Griffith, Heather
• Primary Examiner(s): Severson, Ryan J.
• Application Number:
  US15/449,837
• Publication Number:
  US 20170172766A1
• Time in Patent Office: 1,061 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;

said anchor member comprising a body that forms a distally-facing backstop surface and a plurality of radially oriented posts fixed distally of said distally-facing backstop surface so as to create a gap with said body;

said anchor member having an elongated depression positioned on an outer surface of said body and in which said core member is fixed within.

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 2 wherein the anchor member sits over the third lumen.

4. The stent delivery device of claim 1 wherein the stent includes a plurality of proximal loops and the plurality of proximal loops fit over the plurality of radially oriented posts.

5. The stent delivery device of claim 1 wherein the anchor member has three posts.

6. The stent delivery device of claim 1 wherein the plurality of radially oriented posts are fixed at equidistant intervals.

7. 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;

said anchor member comprising a body that forms a distally-facing backstop surface and a plurality of radially oriented posts fixed distally of said distally-facing backstop surface so as to create a gap with said body;

said anchor member having an elongated depression positioned on an outer surface of said body and in which said core member is fixed within; 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.

8. The stent delivery device of claim 7 wherein the anchor member has three posts fixed at equidistant radial intervals from each other.

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

10. The stent delivery device of claim 7 wherein the third lumen channels through the anchor member.

11. 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;

said anchor member comprising a body that forms a distally-facing backstop surface and a plurality of radially oriented posts fixed distally of said distally-facing backstop surface so as to create a gap with said body;

said anchor member having an elongated depression positioned on an outer surface of said body and in which said core member is fixed within; and

,

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;

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.