Nested stent

• US 20040193251A1
• Filed: 02/10/2004
• Published: 09/30/2004
• Est. Priority Date: 08/12/1994
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Meadox Medicals, Inc. (Boston Scientific Corporation)
• Inventors: Rudnick, James J., Wiktor, Dominik M.
• Granted Patent: US 8,092,512 B2
• Time in Patent Office: Days
• US Class Current: 623/1.22
• 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 2220/0058 soldered or brazed or welded
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

An intraluminally implantable stent is formed of helically wound wire. The stent has a generally elongate tubular configuration and is radially expandable after implantation in a body vessel. The wire includes successively formed waves along the length of the wire. When helically wound into a tube, the waves are longitudinally nested along the longitudinal extent of the stent so as to form a densely compacted wire configuration. After radial expansion the stent maintains high radial compressive strength and wire density to retard tissue ingrowth.

Claims

1-53. -53. (canceled)

54. A device comprising:

a support component having multiple turns of an undulating member, said member being formed from a single continuous wire, each turn of said undulating member having multiple undulations defining multiple apexes, with undulations in one turn generally in-phase with undulations in an adjacent turn; and

a tubular graft component substantially coaxial with said support component, said tubular graft component being attached to said support component only in-part, allowing unattached apexes to move longitudinally relative to said graft component; and

said support component being slidably secured to said graft component such that relative movement therebetween is limited.

55. A device comprising:

a support component comprising multiple turns of an undulating member, said member being formed from a single continuous wire, each turn of said undulating member having multiple undulations which define multiple apexes, wherein undulations in one turn are generally in-phase with undulations in an adjacent turn; and

a tubular graft component positioned substantially coaxially within said support component, said tubular graft component being attached to said support component to allow said apexes to move longitudinally relative to said graft component.

56. The device of claim 55 wherein said member is a helical member configured to form said support component and which forms said multiple turns of said support component.

57. The device of claim 55 wherein the support component comprises wire and the undulations have a sinusoidal shape.

58. The device of claim 55 wherein the support component comprises wire and the undulations are U-shaped.

59. The device of claim 55 wherein the support component comprises wire and the undulations are V-shaped.

60. A stent-graft comprising:

a self expanding stent comprising an undulating member, said member being formed from a single continuous wire arranged in a helical configuration with multiple turns and having multiple undulations, each undulation having an apex, undulations in adjacent turns being generally in-phase with one another; and

a graft positioned substantially coaxially within said stent, said graft being attached to said stent to allow said apexes to move longitudinally relative to said graft.