Flexible metal wire stent

• US 20040199244A1
• Filed: 04/19/2004
• Published: 10/07/2004
• Est. Priority Date: 10/01/1997
• Status: Active Grant

• Current Assignee: Boston Scientific Corporation
• Original Assignee: Boston Scientific Corporation
• Inventors: DiMatteo, Kristian J., Roberts, George T., Ravenscroft, Adrian C., Ballou, Kurt
• Granted Patent: US 6,976,994 B2
• Time in Patent Office: Days
• US Class Current: 623/1.16
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30451 soldered or brazed or welded
• CPC Class Codes: A61F 2002/828 Means for connecting a plurality of stents allowing flexibility of the whole structure
• CPC Class Codes: A61F 2210/0019 operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body

Abstract

A self-expanding metal wire stent made of shape memory alloy such as nitinol in which a plurality of spaced sections of closed cells are interconnected by straight sections of wire which may be parallel to the longitudinal axis of the stent or may be disposed angularly with respect thereto.

Claims

1. A stent comprised of a tube form body having a body wall structure of a geometric pattern of cells defined by wire extending throughout the body portion and defining the cell pattern as a plurality of spaced sections of interconnected cells which in plan view are of polygonal configuration, at least one of the plurality of spaced sections having two rows of cells circumferentially distributed about the tube, adjacent spaced sections being connected to each other by at least one straight connector section of the wire, the at least one straight connector section comprising at least a pair of wire segments.

3. The stent of claim 1 wherein the at least one straight connector section comprises two connecting straight sections of the wire, the two being circumferentially spaced apart by about 180°

.

4. The stent of claim 1 wherein the at least one straight connector section comprises three connecting straight sections of the wire, the three being circumferentially spaced apart by about 120°

.

5. The stent of claim 1 in which the wire is of a nitinol alloy.

6. The stent of claim 1 in which the polygonal configuration is hexagonal.

7. The stent of claim 1 wherein the straight sections are disposed at an angle relative to the longitudinal axis of the stent.

8. The stent of claim 1 including a covering sleeve.

9. The stent of claim 1 wherein the at least one straight connector section of the wire extends continuously throughout the longitudinal length of the stent.

10. The stent of claim 9 including a plurality of continuous connecting wires.

11. The stent of claim 1 in which the cells are of a hexagonal configuration.

12. The stent of claim 11 in which at least some of the cells include two adjacent inverted sides which receive a connecting wire.

2. (Cancelled)

13-20. -20. (Cancelled)