Intravascular stent

• US 6,409,761 B1
• Filed: 04/20/2001
• Issued: 06/25/2002
• Est. Priority Date: 04/26/1996
• Status: Expired due to Term

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Scimed Life Systems Incorporated (Boston Scientific Corporation)
• Inventors: Jang, G. David
• Primary Examiner(s): Nguyen, Dinh X.
• Application Number:
  US09/839,442
• Time in Patent Office: 431 Days
• Field of Search: 623/1.12, 623/1.15, 623/1.16, 623/1.2, 606/191-200
• US Class Current: 623/6.12
• 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 in a non-expanded state, comprising:

a first column expansion strut pair formed of a first expansion strut and a second expansion strut that is parallel to the first expansion strut, the first and second expansion struts being coupled by a substantially linear joining strut that is joined to each of the first and second expansion struts at a non-perpendicular angle, a plurality of the first column expansion strut pair forming a first expansion column;

a second column expansion strut pair formed of a first expansion strut and a parallel second expansion strut, the first and second expansion struts being coupled by a substantially linear joining strut that is joined to each of the first and second expansion struts at a non-perpendicular angle, a plurality of the second column expansion strut pair forming a second expansion column; and

a plurality of first serial connecting struts forming a first connecting strut column, the plurality of first serial connecting struts coupling the first expansion column to the second expansion column, a first connecting strut in the first connecting strut column having a proximal stem that includes curvature, a distal portion with a distal stem that includes curvature and an intermediate portion that couples the proximal and distal portions; and

wherein the first expansion column, the second expansion column, and the first connecting strut column forming a plurality of symmetrical geometric cells.

2. A stent in a non-expanded state, comprising:

a first expansion column formed of a plurality of pairs of a first expansion strut and a parallel second expansion strut, the first and second expansion struts being coupled by a substantially linear joining strut that is joined to each of the first and second expansion struts at a non-perpendicular angle;

a second expansion column formed of a plurality of pairs of a first expansion strut and a parallel second expansion strut, the first and second expansion struts being coupled by a substantially linear joining strut that is joined to each of the first and second expansion struts at a non-perpendicular angle;

a first connecting strut column formed of a plurality of first connecting struts, a first connecting strut in the first connecting strut column having a proximal portion that includes curvature, a distal portion that includes curvature and an intermediate portion that couples the proximal and distal portions, wherein the first connecting strut column couples the first expansion column to the second expansion column and includes a first slant angle formed between the proximal and distal portions.