STENT WITH IMPROVED END CELL STRUCTURAL MEMBER

• US 20130073052A1
• Filed: 02/17/2011
• Published: 03/21/2013
• Est. Priority Date: 02/17/2010
• Status: Abandoned Application

• Current Assignee: Cook Medical Incorporated (Cook Group Incorporated)
• Original Assignee: Cook Medical Incorporated (Cook Group Incorporated), Med Institute
• Inventors: Kim, Seoggwan, Swift, Richard A.
• Application Number:
  US13/579,172
• Publication Number:
  US 20130073052A1
• Time in Patent Office: Days
• US Class Current: 623/23.7
• 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 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0036 differing in thickness
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

A stent (30) is provided with an improved structural member (38) at the end (34) of the stent structure (32) to minimize deformation of the stent structure when pushing forces are applied to the end of the stent. The improved structural member is wider than other structural members (40, 42, 44, 46, 48) in the stent structure. The improved structural member is better able to distribute pushing forces to the other structural members in the stent structure with minimal deformation.

Claims

1. A stent, comprising

a series of structural members extending around a circumference from a first end to a second end, said structural members being expandable between a collapsed diameter and an expanded diameter;

wherein said structural members forming one of said first and second ends comprise a series of first structural members and a series second structural members, wherein each of said first structural members are circumferentially interconnected by said second structural members;

a pushing member attached to an outer end of each of said first structural members; and

wherein said first structural members are at least 1.5 times as wide as said second structural members.

2. The stent according to claim 1, wherein said stent is about 5 French or less in diameter.

3. The stent according to claim 1, wherein said stent is between about 4 and about 5 French in diameter.

4. The stent according to claim 1, wherein said first structural members are at least 2.25 times wider than said second structural members.

5. The stent according to claim 1, wherein said stent is self-expanding.

6. The stent according to claim 1, wherein a cross-section of said series of structural members is generally rectangular.

7. The stent according to claim 1, wherein said pushing member is a round eyelet.

8. The stent according to claim 1, wherein each of said pushing members is attached to one of said second structural members on both sides of each of said first structural members.

9. The stent according to claim 8, wherein each of said first structural members is circumferentially interconnected to a circumferentially adjacent first structural member by six of said second structural members oriented in a sinusoidal pattern.

10. The stent according to claim 9, wherein said first structural members comprise three structural members.

11. The stent according to claim 10, wherein said series of structural members further comprise a series of third structural members, said third structural members being oriented in a sinusoidal ring around said circumference, wherein an inner end of each of said first structural members is attached to two of said third structural members, said first structural members being approximately as long as said second structural members and being longitudinally offset from said third structural members.

12. The stent according to claim 11, wherein said third structural members oriented in said sinusoidal ring comprise 18 structural members.

13. The stent according to claim 12, wherein said series of structural members further comprise a series of fourth structural members, a series of fifth structural members and a series of sixth structural members oriented in a sinusoidal ring around said circumference, wherein one end of each of said fourth structural members is attached to two of said third structural members and another end of said fourth structural members is attached to two of said sixth structural members, said fourth structural members being approximately as long as said sixth structural members and being circumferentially adjacent said sixth structural members, wherein one end of each of said fifth structural members is attached to two of said sixth structural members and another end of said fifth structural members extends away from said third structural members, said fifth structural members being approximately as long as said sixth structural members and being circumferentially adjacent said sixth structural members, wherein said sixth structural members are oriented in a sinusoidal pattern and circumferentially interconnect said fourth and fifth structural members.

14. The stent according to claim 13, wherein said fourth structural members comprise three structural members, said fifth structural members comprise three structural members, and said sixth structural members comprise 18 structural members.

15. The stent according to claim 14, wherein a width of said fourth, fifth and sixth structural members is substantially equal to said width of a second structural members.

16. A stent, comprising:

a series of structural members extending around a circumference from a first end to a second end, said structural members being self-expanding from a collapsed diameter to an expanded diameter, wherein a cross-section of said structural members is generally rectangular;

wherein said structural members forming one of said first and second ends comprise a series of first structural members and a series second structural members, wherein each of said first structural members are circumferentially interconnected by said second structural members;

a pushing member attached to an outer end of each of said first structural members, wherein each of said pushing members is attached to one of said second structural members on both sides of each of said first structural members;

wherein said first structural members are at least 2.25 times wider than said second structural members;

wherein said series of structural members further comprise a series of fourth structural members, a series of fifth structural members and a series of sixth structural members oriented in a sinusoidal ring around said circumference, wherein one end of each of said fourth structural members is attached to said first structural members through a series of third structural members and another end of said fourth structural members is attached to two of said sixth structural members, said fourth structural members being approximately as long as said sixth structural members and being circumferentially adjacent said sixth structural members, wherein one end of each of said fifth structural members is attached to two of said sixth structural members and another end of said fifth structural members extends away from said third structural members, said fifth structural members being approximately as long as said sixth structural members and being circumferentially adjacent said sixth structural members, wherein said sixth structural members are oriented in a sinusoidal pattern and circumferentially interconnect said fourth and fifth structural members; and

wherein a width of said fourth, fifth and sixth structural members is substantially equal to a width of said second structural members.

17. The stent according to claim 16, wherein each of said first structural members is circumferentially interconnected to a circumferentially adjacent first structural member by six of said second structural members oriented in a sinusoidal pattern, said first structural members comprising three structural members, said fourth structural members comprising three structural members, said fifth structural members comprising three structural members, and said sixth structural members comprising 18 structural members.

18. The stent according to claim 17, wherein said stent is between about 4 and about 5 French in diameter.

19. The stent according to claim 18, wherein said third structural members are oriented in a sinusoidal ring around said circumference, wherein an inner end of each of said first structural members is attached to two of said third structural members and said one end of said fourth structural members is attached to two of said third structural members, said first structural members being approximately as long as said second structural members and being longitudinally offset from said third structural members.

20. The stent according to claim 19, wherein said third structural members oriented in said sinusoidal ring comprise 18 structural members.