Multi-layer stent

• US 7,060,089 B2
• Filed: 01/23/2002
• Issued: 06/13/2006
• Est. Priority Date: 01/23/2002
• Status: Expired due to Fees

• Current Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed (Boston Scientific Corporation)
• Inventors: Brown, Brian J., Ley, Timothy J.
• Primary Examiner(s): Woo, Julian W.
• Assistant Examiner(s): NGUYEN, VI X
• Application Number:
  US10/055,307
• Publication Number:
  US 20030139799A1
• Time in Patent Office: 1,602 Days
• Field of Search: 606/198, 623/1.15, 623/1.1, 623/1.11, 623/1.12, 623/1.13, 623/1.14, 623 116- 118, 623/1.2
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/0077 Special surfaces of prostheses, e.g. for improving ingrowth A61F2/30767 takes precedence
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• 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 2002/91541 Adjacent bands are arranged out of phase
• CPC Class Codes: A61F 2002/9155 Adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0023 triangular
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts

Abstract

A stent may be formed having a reduced state and an expanded state. The stent having a longitudinal axis therethrough. The stent comprises at least one serpentine segment having a proximal end and a distal end. The serpentine segment comprises a plurality of peaks and troughs, wherein the peaks are disposed at the distal end of the segment and the troughs are disposed at the proximal end of the segment. The peaks include first peaks and second peaks arranged in a regular alternating pattern about the longitudinal axis. In the reduced state the first peaks disposed at a first distance from the longitudinal axis of the stent and the second peaks disposed at a second distance from the longitudinal axis of the stent. The second distance is less than the first distance. The first peaks defining a substantially cylindrical outer surface of the segment.

Claims

1. A stent having a reduced state and an expanded state, and further having longitudinal axis therethrough, the stent comprising at least one serpentine segment having a proximal end and a distal end, the serpentine segment comprising a plurality of peaks and troughs, in the reduced state a plurality of first peaks disposed at a first distance from the longitudinal axis of the stent and a plurality of second peaks disposed at a second distance from the longitudinal axis of the stent, the second distance less than the first distance, in the expanded state the first distance being substantially the same as the second distance, the first peaks defining a substantially cylindrical outer surface of the segment.

2. The stent of claim 1 wherein the troughs include first troughs and second troughs arranged in a regular alternating pattern about the longitudinal axis, the first troughs disposed at a first distance from the longitudinal axis of the stent, the second troughs disposed at a second distance from the longitudinal axis of the stent, the second distance different from the first distance.

3. The stent of claim 1 comprising a plurality of serpentine segments.

4. The stent of claim 3 wherein serpentine segments which are adjacent one another are connected one to the other.

5. The stent of claim 1 wherein the second peaks define a substantially cylindrical inner surface of the segment.

6. The stent of claim 5 wherein the substantially cylindrical inner surface of the segment tapers outward toward the substantially cylindrical outer surface of the segment.