TWISTED ANCHORING BARB FOR STENT OF ABDOMINAL AORTIC ANEURYSM (AAA) DEVICE

• US 20100312330A1
• Filed: 08/19/2010
• Published: 12/09/2010
• Est. Priority Date: 07/18/2006
• Status: Active Grant

• Current Assignee: David C. Majercak, Jin S. Park
• Original Assignee: David C. Majercak, Jin S. Park
• Inventors: Park, Jin S., Majercak, David C.
• Granted Patent: US 8,372,141 B2
• Time in Patent Office: Days
• US Class Current: 623/1.36
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/8483 Barbs
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0039 differing in diameter

Abstract

A stent is provided for an endoprosthesis having a main body portion and two leg portions, particularly suitable for treatment of an abdominal aortic aneurism. The stent includes barbs that are twisted and shaped set to point radially outward. Each barb, as formed, points substantially perpendicular relative to the longitudinal axis of the stent, even when in a non-deployed configuration. The motion to move the barb into a deployed configuration for gripping tissue is a twisting motion which moves the barb from being substantially aligned with the circumference of the stent to extending radially outwards from the stent.

Claims

1. (canceled)

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3. (canceled)

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5. (canceled)

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12. (canceled)

13. A stent, comprising:

a plurality of struts coupled together to define a tubular stent; and

at least one barb coupled to said struts, said barb including an anchor portion and a neck portion shape set to bias said anchor portion to rotate about an axis extending in alignment through the neck portion of the barb.

14. A stent according to claim 13, wherein:

said stent and barb together defining three axes, an X-axis extending tangential to a circumference of said stent, a Y-axis extending radially outward from said stent, and a Z-axis extending through said neck portion of said barb,

wherein said neck portion is shape set biased to rotate said anchor portion about said Z-axis.

15. A stent according to claim 13, wherein:

said anchor portion, as formed, is oriented substantially perpendicular relative to said Z-axis.

16. A stent according to claim 13, wherein:

said stent is movable between a collapsed non-deployed configuration and an expanded deployed configuration, and when said stent is in said non-deployed configuration said anchor portion is substantially oriented about said circumference of said stent.

17. A stent according to claim 13, wherein:

when said stent is in said deployed configuration, said anchor portion is oriented substantially radially relative to Z-axis.

18. A stent according to claim 13, wherein:

said neck portion rotates said anchor portion of said barb into orientation during expansion into said deployed configuration.

19. A stent according to claim 13, wherein:

said stent is a self-expanding stent.

20. (canceled)

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