Stent with protruding branch portion for bifurcated vessels

• US 7,815,675 B2
• Filed: 03/10/2008
• Issued: 10/19/2010
• Est. Priority Date: 11/04/1996
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Williams, Eric, Feld, Tanhum, Morik, Yossi, Konstantino, Eitan, Vardi, Gil M., Davidson, Charles J., Yadin, Amnon
• Primary Examiner(s): Pellegrino; Brian E.
• Application Number:
  US12/045,537
• Publication Number:
  US 20090076592A1
• Time in Patent Office: 953 Days
• Field of Search: 623/1.15, 623/1.16, 623/1.35, 606/108, 606/191, 606/192, 606/194, 606/198
• US Class Current: 623/1.35
• 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 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• 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 2002/067 modular
• CPC Class Codes: A61F 2002/821 Ostial stents
• 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 2002/91525 within the whole structure different bands showing different meander characteristics, e.g. frequency or amplitude
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91566 connected trough to trough
• 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 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61F 2250/0039 differing in diameter
• CPC Class Codes: A61M 2025/1045 for treating bifurcations, e.g. balloons in y-configuration, separate balloons or special features of the catheter for treating bifurcations
• CPC Class Codes: A61M 25/1002 characterised by balloon shape A61M25/1006, A61M25/1009 take precedence

Abstract

A stent for use in a bifurcated body lumen having a main branch and a side branch. The stent comprises a radially expandable generally tubular stent body having proximal and distal opposing ends with a body wall having a surface extending therebetween. The surface has a geometrical configuration defining a first pattern, and the first pattern has first pattern struts and connectors arranged in a predetermined configuration. The stent also comprises a branch portion comprised of a second pattern, wherein the branch portion is outwardly expandable from the stent body.

Claims

1. A stent comprising:

a tubular member defining a stent longitudinal axis, the tubular member having a first end section, a midsection and a second end section the tubular member comprising a framework having a plurality of openings;

the midsection comprising an expandable branch structure, a first partial serpentine ring and a first transition member, the expandable branch structure comprising a side branch ring comprising a plurality of outwardly expandable petals, the side branch ring defining a central branch opening having a unique shape, the first transition member comprising a first straight portion oriented non-parallel to the stent longitudinal axis, the first partial serpentine ring comprising alternating struts and turns, wherein a first plurality of adjacent struts each comprise a straight portion that is parallel to the first straight portion of the first transition member.

2. The stent of claim 1, wherein each strut of the first plurality of adjacent struts further comprises a second straight portion that is parallel to the stent longitudinal axis.

3. The stent of claim 1, wherein the first plurality of adjacent struts comprises at least four struts.

4. The stent of claim 1, wherein at least a portion of the first transition member is positioned between the expandable branch structure and the first partial serpentine ring.

5. A stent comprising:

a tubular member defining a stent longitudinal axis, the tubular member having a first end section, a midsection and a second end section;

the midsection comprising an expandable branch structure, a first partial serpentine ring and a first transition member, the expandable branch structure comprising a side branch ring comprising a plurality of outwardly expandable petals, the first transition member comprising a first straight portion oriented non-parallel to the stent longitudinal axis, the first partial serpentine ring comprising alternating struts and turns, wherein a first plurality of adjacent struts each comprise a straight portion that is parallel to the first straight portion of the first transition member;

wherein the first transition member comprises a curved portion, and the first partial serpentine ring is attached at one end to a first portion of the curved portion and is attached at the other end to a second portion of the curved portion.

6. A stent comprising:

a tubular member defining a stent longitudinal axis, the tubular member having a first end section, a midsection and a second end section;

the midsection comprising an expandable branch structure, a first partial serpentine ring and a first transition member, the expandable branch structure comprising a side branch ring comprising a plurality of outwardly expandable petals, the first transition member comprising a first straight portion oriented non-parallel to the stent longitudinal axis, the first partial serpentine ring comprising alternating struts and turns, wherein a first plurality of adjacent struts each comprise a straight portion that is parallel to the first straight portion of the first transition member;

the first transition member comprising a second straight portion oriented non-parallel to the first straight portion, wherein a second plurality of adjacent struts of the first partial serpentine ring each comprise a straight portion that is parallel to the second straight portion of the first transition member.

7. The stent of claim 6, wherein each strut of the second plurality of adjacent struts further comprises a second straight portion that is parallel to the stent longitudinal axis.

8. The stent of claim 6, wherein the second plurality of adjacent struts comprises at least four struts.

9. The stent of claim 6, wherein the first straight portion of the first transition member is positioned between the expandable branch structure and the first plurality of adjacent struts, and the second straight portion of the first transition member is positioned between the expandable branch structure and the second plurality of adjacent struts.

10. The stent of claim 6, wherein the second straight portion of the first transition member comprises a mirror image of the first straight portion.

11. The stent of claim 10, wherein the mirror image is taken across a line parallel to the stent longitudinal axis.

12. The stent of claim 6, the midsection further comprising a second transition member and a second partial serpentine ring.

13. The stent of claim 12, wherein the second transition member comprises a mirror image of the first transition member.

14. The stent of claim 13, wherein the second partial serpentine ring comprises a mirror image of the first partial serpentine ring.

15. The stent of claim 12, the second transition member comprising a first straight portion oriented non-parallel to the stent longitudinal axis, the second partial serpentine ring comprising a first plurality of adjacent struts that each comprise a straight portion that is parallel to the first straight portion of the second transition member.

16. The stent of claim 15, wherein each strut of the first plurality of adjacent struts of the second partial serpentine ring further comprises a second straight portion that is parallel to the stent longitudinal axis.

17. The stent of claim 15, the second transition member comprising a second straight portion oriented non-parallel to the first straight portion of the second transition member, wherein a second plurality of adjacent struts of the second partial serpentine ring each comprise a straight portion that is parallel to the second straight portion of the second transition member.

18. The stent of claim 17, wherein each strut of the second plurality of adjacent struts of the second partial serpentine ring further comprises a second straight portion that is parallel to the stent longitudinal axis.

19. The stent of claim 17, wherein the first straight portion of the second transition member is positioned between the expandable branch structure and the first plurality of adjacent struts of the second partial serpentine ring, and the second straight portion of the second transition member is positioned between the expandable branch structure and the second plurality of adjacent struts of the second partial serpentine ring.

20. The stent of claim 12, wherein the second transition member comprises a curved portion, and the second partial serpentine ring is attached at one end to a first portion of the curved portion and is attached at the other end to a second portion of the curved portion.