Plain woven stents

• US 8,876,880 B2
• Filed: 07/13/2012
• Issued: 11/04/2014
• Est. Priority Date: 02/01/1999
• Status: Expired due to Fees

• Current Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Original Assignee: Board of Regents of the University of Texas System (University of Texas System)
• Inventors: Hyodoh, Hideki, Konya, Andras, Wright, Kenneth C.
• Primary Examiner(s): NGUYEN, TUAN VAN
• Application Number:
  US13/549,357
• Publication Number:
  US 20120330398A1
• Time in Patent Office: 844 Days
• Field of Search: 623 111- 115, 623/1.2, 606/194, 606/198
• US Class Current: 623/1.11
• CPC Class Codes: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/0108 Both ends closed, i.e. legs gathered at both ends
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/962 having an outer sleeve
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/077 having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 : sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0006 : circular
• CPC Class Codes: A61F 2230/001 : Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0015 : Kidney-shaped, e.g. bean-shaped
• CPC Class Codes: A61F 2230/0065 : toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/0067 : conical
• CPC Class Codes: A61F 2230/0069 : cylindrical
• CPC Class Codes: A61F 2230/0076 : ellipsoidal or ovoid
• CPC Class Codes: A61F 2230/0078 : hyperboloidal
• CPC Class Codes: A61F 2230/008 : paraboloidal
• CPC Class Codes: A61F 2230/0091 : helically-coiled or spirally-coiled, i.e. having a 2-D spiral cross-section
• CPC Class Codes: A61F 2230/0093 : Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2250/0039 : differing in diameter
• CPC Class Codes: D04C 1/06 : Braid or lace serving particular purposes
• CPC Class Codes: D04C 3/48 : Auxiliary devices
• CPC Class Codes: D10B 2509/06 : Vascular grafts; stents

Abstract

Methods for treating femoro-popliteal artery of a patient include delivering a self-expanding, woven stent from a delivery system. The methods may include delivering a guidewire to a lesion in the femoro-popliteal artery stem over the guidewire.

Claims

1. A method of treating a femoro-popliteal artery of a patient, comprising:

delivering a guidewire to a lesion in the femoro-popliteal artery;

advancing a stent delivery system over the guidewire to the lesion in the femoro-popliteal artery, the stent delivery system carrying a stent comprising a plurality of woven strands in a constrained configuration;

releasing the stent from the stent delivery system, wherein releasing the stent causes the plurality of woven strands to self-expand and apply a radial force to the femoro-popliteal artery, wherein the stent when fully expanded in the femoro-popliteal artery has a diameter that is greater than 110% of a diameter of the femoro-popliteal artery being stented,

the stent having first and second opposed ends and comprising a plurality of wire strands plain woven to form a plurality of crossed regions defining geometric cells, wherein each wire strand has strand ends and the strand ends are disposed proximate to the second end of the stent, and wherein each strand end is welded to another strand end.

2. The method of claim 1, wherein the stent delivery system is advanced into the patient through an introducer sheath.

3. The method of claim 1, wherein releasing the stent includes shortening the stent from a delivery length to a deployed length, and wherein releasing the stent includes positioning a distal end of the stent in a final location prior to shortening the stent.

4. The method of claim 1, wherein the stent has a tapered shape with a diameter that decreases from one end of the stent to the other end of the stent.

5. A method comprising delivering a stent from a stent deployment device into a femoro-popliteal artery, the stent comprising a plurality of strands plain woven to form a plurality of crossed regions defining geometric cells,

wherein each said strand has strand ends, the strand ends are disposed proximate to an end of the stent, and

wherein each said strand end is secured to another said strand end by welding.

6. The method of claim 5, wherein delivering the stent from the stent deployment device into the femoro-popliteal artery is after positioning a guidewire in the femoro-popliteal artery.

7. The method of claim 5, wherein the stent deployment device comprises a first tubular member and a second tubular member coaxially inside the first tubular member, the stent coaxially between the first tubular member and the second tubular member.

8. The method of claim 7, wherein delivering the stent from the stent deployment device comprises maintaining a position of the first tubular member and moving the second tubular member.

9. The method of claim 7, wherein, at least one of before and during delivery, the second tubular member engages one or more crossed regions of the stent.

10. The method of claim 7, wherein delivering the stent from the stent deployment device comprises advancing the stent distally out of the first tubular member when distally advancing the second tubular member.

11. The method of claim 5, wherein the secured strand ends are spaced along a circumference of the stent.

12. The method of claim 5, wherein the stent has a tapered shape with a diameter that decreases from one end of the stent to the other end of the stent.

13. The method of claim 5, wherein a diameter of the stent is between about 4.5 mm and about 10 mm.

14. The method of claim 5, wherein a diameter of the stent is at least about 10 mm.

15. The method of claim 5, wherein a length of the stent is between about 20 mm and about 100 mm.

16. The method of claim 5, wherein a diameter of each strand is between about 0.006 inches and 0.009 inches.

17. The method of claim 5, wherein a diameter of each strand is between about 0.006 inches and 0.012 inches.

18. The method of claim 5, wherein the stent when fully expanded in the femoro-popliteal artery has a diameter that is greater than 110% of the diameter of the femoro-popliteal artery being stented.

19. The method of claim 5, wherein delivering the stent from the stent deployment device causes the plurality of woven strands to self-expand and apply a radial force to the femoro-popliteal artery.

20. The method of claim 5, wherein the stent deployment device is advanced into the patient through an introducer sheath.

21. The method of claim 5, wherein delivering the stent comprises shortening the stent from a delivery length to a deployed length, and wherein delivering the stent comprises positioning a distal end of the stent in a final location prior to shortening the stent.

22. The method of claim 5, wherein the plurality of strands comprises biodegradable filaments.

23. The method of claim 22, wherein the biodegradable filaments comprise poly-L-lactic acid.

24. The method of claim 22, wherein the biodegradable filaments comprise a drug.

25. The method of claim 24, wherein the drug is an anticancer drug.