LOCKED SEGMENTS PUSHABLE STENT-GRAFT

• US 20100324657A1
• Filed: 06/20/2008
• Published: 12/23/2010
• Est. Priority Date: 06/22/2007
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Bogert, David L.
• Granted Patent: US 9,427,343 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• 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 2002/91591 Locking connectors, e.g. using male-female connections
• CPC Class Codes: A61F 2220/005 using adhesives
• 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 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2230/0056 W-shaped, e.g. M-shaped, sigma-shaped

Abstract

An implantable prosthesis includes a scaffold with a plurality of expandable segments axially spaced apart along a substrate, adjacent segments connected by one or more support members when the prosthesis is in a collapsed configuration and disconnected when the prosthesis is in an expanded configuration.

Claims

1. An implantable prosthesis having an expanded configuration defining an expanded perimeter and a collapsed configuration defining a collapsed perimeter smaller than the expanded perimeter, comprising:

a generally tubular substrate defining a longitudinal axis;

a plurality of expandable segments disposed over the substrate and spaced apart along the longitudinal axis, and

a plurality of support members connected to the expandable segments and extending transversely therefrom, each support member including a first element connected to a first expandable segment and a second element connected to a second expandable segment adjacent to the first expandable segment, the first element and second element engaged in the collapsed configuration and disengaged in the expanded configuration.

2. The implantable prosthesis according to claim 1, wherein one of the first element and second element includes a distal end with a detent and the other of the first element and second element includes a distal end with a shape configured to extend into the detent and form a friction fit therewith.

3. The implantable prosthesis according to claim 2, wherein the configuration of the detent is selected from the group consisting essentially of “

U”

shaped, “

V”

shaped, “

W”

shaped, and combinations thereof.

4. The implantable prosthesis according to claim 1, wherein one of the first element and second element comprises a first leg and a second leg, and the other of the first element and second element comprises a third leg.

5. The implantable prosthesis according to claim 4, wherein a distal portion of the first leg is positioned adjacent to a distal portion of the second leg in the collapsed configuration, a distal end of the third leg spaced less than about 100 microns from a distal end of the first leg and a distal end of the second leg.

6. The implantable prosthesis according to claim 4, wherein a distal portion of the first leg is positioned adjacent to a distal portion of the second leg in the collapsed configuration, a distal end of the third leg in contact with a distal end of the first leg and a distal end of the second leg.

7. The implantable prosthesis according to claim 6, wherein the distal portion of the first leg is positioned apart from the distal portion of the second leg in the expanded configuration, the distal end of the third leg out of contact with the distal ends of the first and second legs.

8. The implantable prosthesis according to claim 7, wherein the first leg is positioned substantially parallel to the second leg in the collapsed configuration.

9. The implantable prosthesis according to claim 8, wherein a proximal end of the first leg and a proximal end of the second leg are connected to the expandable segment such that expansion to the expanded configuration moves the first and second legs in approximately opposite directions.

10. The implantable prosthesis according to claim 9, wherein the first and second legs together form a “

V”

shape in the expanded configuration.

11. The implantable prosthesis according to claim 5, wherein the first and second legs include beveled distal ends that together form a “

V”

shape in the collapsed configuration, the third leg including a distal end configured to extend into the “

V”

shape.

12. The implantable prosthesis according to claim 1, wherein the first element includes a first leg and the second element includes a second leg, wherein a distal end of the first leg is in contact with a distal end of the second leg in the collapsed configuration.

13. The implantable prosthesis according to claim 12, wherein the first and second legs are positioned generally parallel to the longitudinal axis of the substrate in the collapsed configuration.

14. The implantable prosthesis according to claim 13, wherein at least one of the first and second legs is positioned generally oblique to the longitudinal axis in the expanded configuration.

15. The implantable prosthesis according to claim 14, wherein the first and second legs move in approximately opposite directions upon expansion to an expanded configuration.

16. The implantable prosthesis according to claim 13, wherein at least one of the first and second legs move in a direction out of plane with the expandable segments upon expansion to an expanded configuration.

17-41. -41. (canceled)

42. An implantable prosthesis having an expanded configuration defining an expanded perimeter and a collapsed configuration defining a collapsed perimeter smaller than the expanded perimeter, comprising:

a generally tubular substrate defining a longitudinal axis;

a scaffold disposed over the substrate, including a plurality of support members positioned generally parallel to the longitudinal axis, each support member including a first element engaged with a second element in the collapsed configuration, at least one of the first and second elements moving to a position generally oblique to the longitudinal axis in the expanded configuration such that the first and second elements are disengaged.

45. The implantable prosthesis according to claim 42, wherein one of the first element and second element comprises a first leg and a second leg, and the other of the first element and second element comprises a third leg.

46. The implantable prosthesis according to claim 45, wherein a distal portion of the first leg is positioned adjacent to a distal portion of the second leg in the collapsed configuration, a distal end of the third leg spaced less than about 100 microns from a distal end of the first leg and a distal end of the second leg.

47. The implantable prosthesis according to claim 45, wherein a distal portion of the first leg is positioned adjacent to a distal portion of the second leg in the collapsed configuration, a distal end of the third leg in contact with a distal end of the first leg and a distal end of the second leg.

48. The implantable prosthesis according to claim 47, wherein the distal portion of the first leg is positioned apart from the distal portion of the second leg in the expanded configuration, the distal end of the third leg out of contact with the distal ends of the first and second legs.

49. The implantable prosthesis according to claim 48, wherein the first leg is positioned substantially parallel to the second leg in the collapsed configuration.

50. The implantable prosthesis according to claim 49, wherein a proximal end of the first leg and a proximal end of the second leg are connected to the expandable segment such that expansion to the expanded configuration moves the first and second legs in approximately opposite directions.

51. The implantable prosthesis according to claim 50, wherein the first and second legs together form a “

V”

shape in the expanded configuration.

52. The implantable prosthesis according to claim 46, wherein the first and second legs include beveled distal ends that together form a “

V”

shape in the collapsed configuration, the third leg including a distal end configured to extend into the “

V”

shape.

53. The implantable prosthesis according to claim 42, wherein the first element includes a first leg and the second element includes a second leg, wherein a distal end of the first leg is in contact with a distal end of the second leg in the collapsed configuration.

54. The implantable prosthesis according to claim 53, wherein the first and second legs move in approximately opposite directions upon expansion to an expanded configuration.

55. The implantable prosthesis according to claim 53, wherein at least one of the first and second legs move in a direction out of plane with the expandable segments upon expansion to an expanded configuration.

43-44. -44. (canceled)

56-75. -75. (canceled)