Intravascular stent

• US 6,656,219 B1
• Filed: 11/22/2000
• Issued: 12/02/2003
• Est. Priority Date: 10/19/1987
• Status: Expired due to Fees

• Current Assignee: Dominik M. Wiktor
• Original Assignee: Dominik M. Wiktor
• Inventors: Wiktor, Dominik M.
• Primary Examiner(s): Lewis, Ralph A.
• Application Number:
  US09/718,859
• Time in Patent Office: 1,105 Days
• Field of Search: 623/1.11, 623/1.12, 623/1.15, 623/1.16, 623/1.17, 623/1.18, 623/1.2, 623/1.22, 606/192, 606/195
• US Class Current: 623/1.15
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/825 having longitudinal struts
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00077 Copper or Cu-based alloys
• CPC Class Codes: A61F 2310/00155 Gold or Au-based alloys
• CPC Class Codes: B21F 45/008 of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

A medical device for use in the interior of a body lumen includes a balloon catheter and a radially expandable stent. The stent includes a plurality of zig-zags of a low memory metal formed into a hollow, open-ended cylindrical shape. The individual zig-zags have a curved portion forming a reversing bend which allows the zig-zags to expand and deform as the balloon radially expands the stent. The curved portions of the zig-zags are aligned along the length of the stent in a spaced-apart arrangement with some curved portions attached and others unattached to adjacent zig-zags. The resulting stent is longitudinally flexible throughout its length when unexpanded and is also capable of conforming to a bend in the body lumen when expanded.

Claims

1. An intravascular stent, comprising:

a continuous sinusoidal shaped wire, wherein said wire is coiled to form a helical-shaped stent body, wherein said stent is expandable from a first delivery diameter to a second implanted diameter.

2. The intravascular stent of claim 1, wherein said stent is mounted on a balloon of a balloon catheter assembly and expanded to said second implanted diameter upon inflation of said balloon.

3. The intravascular stent of claim 1, wherein at least a portion of said stent is expanded by the balloon of a balloon catheter.

4. An intravascular stent, comprising:

a helical shaped stent body including a wire coiled into said helical shape, wherein said wire comprises a series of undulations, wherein the stent body may be expanded from a first delivery diameter to a second implanted diameter.

5. The intravascular stent of claim 4, wherein said stent is mounted on a balloon of a balloon catheter assembly and expanded to said second implanted diameter upon inflation of said balloon.

6. The intravascular stent of claim 4, wherein at least a portion of said stent is expanded by the balloon of a balloon catheter.

7. A stent for implantation into a body lumen, comprising:

an undulating wire coiled into a helical shape to form a cylindrical stent body, wherein said stent can be expanded within said lumen from a first diameter to a second diameter.

8. The stent of claim 7, wherein said stent is mounted on a balloon of a balloon catheter assembly and expanded to said second diameter upon inflation of said balloon.

9. The stent of claim 7, wherein at least a portion of said stent is expanded by the balloon of a balloon catheter.