Intravascular Stent

• US 7,081,130 B2
• Filed: 04/16/2002
• Issued: 07/25/2006
• Est. Priority Date: 04/26/1996
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Jang, G. David
• Primary Examiner(s): Nguyen, Anhtuan T.
• Assistant Examiner(s): Houston, Elizabeth
• Application Number:
  US10/124,224
• Publication Number:
  US 20020161430A1
• Time in Patent Office: 1,561 Days
• Field of Search: 623/1.15, 623/1.32, 623/1.34, 623/1.17, 623/1.3, 623/1.31, 606/191, 606/194, 606/195
• US Class Current: 623/1.17
• 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 2/91 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 2/958 Inflatable balloons for placing stents or stent-grafts
• 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 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility

Abstract

A stent in a non-expanded state has a first column expansion strut pair. A plurality of the first column expansion strut pair form a first expansion column. A plurality of second column expansion strut pair form a second expansion column. A plurality of first serial connecting struts form a first connecting strut column that couples the first expansion column to the second expansion column. The first expansion column, the second expansion column, and the first connecting strut column form a plurality of geometric cells. At least a portion of the plurality are asymmetrical geometric cells.

Claims

1. A stent having a plurality of interconnected circumferential bands, each circumferential band having a plurality of alternating peaks and troughs joined by struts, each strut having a length along the surface of the stent and a width along the surface of the stent, and a thickness as measured in a radial direction, the length exceeding the width, the circumferential bands including a plurality of bands having struts of a wider width than the struts of the other circumferential bands, at least one band having struts of a wider width at an end of the stent, each band having struts of a wider width further having a plurality of struts of a first length and a plurality of struts of a second length longer than the first length, adjacent circumferential bands connected peak to trough.

2. The stent of claim 1 wherein the stent comprises a proximal end and a distal end, a proximal band having struts of a wider width being at the proximal end of the stent and a distal band having struts of a wider width being at the distal end of the stent.

3. The stent of claim 2 wherein the plurality of bands having struts of a wider width further comprise an intermediate band having struts of a wider width, the intermediate band having struts of a wider width being between the proximal band having struts of a wider width and the distal band having struts of a wider width.

4. A stent having a plurality of interconnected circumferential bands, each circumferential band having a plurality of alternating peaks and troughs joined by struts, each strut joined at a proximal end to a proximal end of one circumferentially adjacent strut and at a distal end to a distal end of another circumferentially adjacent strut, at least some of the circumferential bands having struts which are arranged such that each strut is of a different length from the struts which are circumferentially adjacent thereto.

5. The stent of claim 4 wherein the adjacent circumferential bands are connected peak to trough.

6. The stent of claim 4 wherein the plurality of circumferential bands comprise a plurality of bands having struts of a wider width than the struts of the other circumferential bands.

7. The stent of claim 6 wherein the stent comprises a proximal end and a distal end, a proximal band having struts of a wider width being at the proximal end of the stent and a distal band having struts of a wider width being at the distal end of the stent.

8. The stent of claim 7 wherein the plurality of bands having struts of a wider width further comprises an intermediate band having struts of a wider width, the intermediate band having struts of a wider width being between the proximal band having struts of a wider width and the distal band having struts of a wider width.