Radially expandable stent

• US 7,147,661 B2
• Filed: 12/20/2001
• Issued: 12/12/2006
• Est. Priority Date: 12/20/2001
• Status: Expired due to Term

• Current Assignee: Endologix
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Zacharias, Isaac, Kari, Stuart, Chobotov, Michael V., Marthaler, Maurice, Glynn, Brian, Whirley, Robert
• Primary Examiner(s): Prebilic, Paul B.
• Application Number:
  US10/029,559
• Publication Number:
  US 20030120331A1
• Time in Patent Office: 1,818 Days
• Field of Search: 623/1.13, 623/1.14, 623/1.25, 623/23.67, 623/1.35, 623/1.36, 623/1.15, 623/1.16
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2/9517 handle assemblies therefor
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/91508 the meander having a difference in amplitude along the band
• CPC Class Codes: A61F 2002/91516 the meander having a change in frequency along the band
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91583 by a bridge, whereby at least one of its ends is connected along the length of a strut between two consecutive apices within a band
• CPC Class Codes: A61F 2002/9505 having retaining means other than an outer sleeve, e.g. male-female connector between stent and instrument
• CPC Class Codes: A61F 2002/9511 the retaining means being filaments or wires
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 : soldered or brazed or welded
• CPC Class Codes: A61F 2250/0003 : having an inflatable pocket filled with fluid, e.g. liquid or gas
• CPC Class Codes: A61F 2250/0036 : differing in thickness
• CPC Class Codes: A61M 2025/0177 : having external means for receiving guide wires, wires or stiffening members, e.g. loops, clamps or lateral tubes

Abstract

This invention is a system for the treatment of body passageways; in particular, vessels with vascular disease. The system includes an endovascular graft with a low-profile delivery configuration and a deployed configuration in which it conforms to the morphology of the vessel or body passageway to be treated as well as various connector members and stents. The graft is made from an inflatable graft body section and may be bifurcated. One or more inflatable cuffs may be disposed at either end of the graft body section. At least one inflatable channel is disposed between and in fluid communication with the inflatable cuffs.

Claims

1. A radially expandable stent comprising:

a first portion that comprises a serpentine ring that comprises 2n interconnected struts, wherein the interconnected struts define n proximal apices and n distal apices;

a second portion that comprises a serpentine ring that comprises n interconnected struts, wherein the interconnected struts define n/2 proximal apices and n/2 distal apices,

wherein n/2 of the n proximal apices of the first portion are integral with the n/2 distal apices of the second portion;

a barb integrally formed on every other strut in the second portion;

a tuck pad integrally formed in the struts in the second portion that are adjacent the struts that comprise the barb; and

connector elements integrally formed with the n distal apices of the first portion.

2. The radially expandable stent of claim 1 further comprising a connector member coupled to the connector elements of the first portion.

3. The radially expandable stent of claim 2 wherein the connector member comprises a serpentine ring.

4. The radially expandable stent of claim 3 wherein the serpentine ring connector member comprises 2n interconnected struts that define n proximal apices and n distal apices.

5. The radially expandable stent of claim 4 wherein the n proximal apices of the connector member comprise n integral connector member connector elements.

6. The radially expandable stent of claim 5 wherein the n connector elements of the connector member are coupled to the n connector elements of the first portion via coupling members.

7. The radially expandable stent of claim 6 wherein the coupling members comprise wire or coil wrapped around the connector elements of the connector member and the connector elements of the first portion.

8. The radially expandable stent of claim 1 wherein at least one of the first and second portion comprises a set of grooves that are configured to receive release bands.

9. The radially expandable stent of claim 1 wherein a width of the struts are tapered between the proximal apices and distal apices.

10. The radially expandable stent of claim 9 wherein the struts have a maximum strut width at the proximal apices or distal apices, and a minimum strut width between the proximal apices and the distal apices.

11. The radially expandable stent of claim 10 wherein a ratio of the maximum strut width to minimum strut width is between about 1:

1 and about 10;

1.

12. The radially expandable stent of claim 1 wherein the one or more barbs have a length from about 1 to about 5 mm.

13. The radially expandable stent of claim 1 wherein the one or more barbs have a length from about 2 to about 4 mm.

14. The radially expandable stent of claim 1 wherein the radially expandable stent is self-expanding.

15. The radially expandable stent of claim 1 wherein the proximal apices of at least one of the first portion and second portion comprise a curved outer surface and a curved inner surface,

wherein both the inner and outer surfaces of the apices comprise a circular radius of curvature.

16. The radially expandable stent of claim 15 wherein the circular radii of curvature comprise a common center point.

17. The radially expandable stent of claim 15 wherein the circular radii of curvature comprise center points that are offset.

18. The radially expandable stent of claim 1 wherein the one or more barbs project radially outward from a longitudinal axis of a strut in the radially expandable stent and at an elevation angle between about 10 degrees to about 45 degrees.

19. The radially expandable stent of claim 1 wherein the one or more barbs are laterally biased in a plane that is orthogonal to a plane in which the barb radial angle is formed to form a barb kick angle.