Radiopaque intraluminal stent

• US 8,852,264 B2
• Filed: 09/14/2012
• Issued: 10/07/2014
• Est. Priority Date: 03/24/2000
• Status: Expired due to Term

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Inventors: Pacetti, Stephen, Kramer, Pamela A.
• Primary Examiner(s): Bui, Vy Q
• Application Number:
  US13/618,602
• Publication Number:
  US 20130013055A1
• Time in Patent Office: 753 Days
• Field of Search: 623 11- 122, 606191-198
• US Class Current: 623/1.15
• 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 2/92 Stents in the form of a rolled-up sheet expanding after insertion into the vessel , e.g. with a spiral shape in cross-section
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/18 Materials at least partially X-ray or laser opaque
• CPC Class Codes: Y10T 29/5185 Tube making

Abstract

The present invention includes a radiopaque stent comprising a cylindrical main body. The tubular main body comprises a cobalt chromium alloy that comprises cobalt, chromium and one or more radiopaque materials.

Claims

1. A radiopaque stent, comprising:

a tubular body comprising a cobalt-chromium alloy including cobalt and chromium, the cobalt-chromium alloy including tungsten as a radiopaque element, the radiopaque element being about 30 percent by weight of the cobalt-chromium alloy;

wherein the cobalt-chromium alloy further comprises manganese, the manganese being present in a concentration of up to about 5% by weight, wherein the cobalt-chromium alloy is substantially free of molybdenum, the cobalt-chromium alloy includes one of silicon, phosphorus, carbon, and sulfur being present in a concentration of greater than 0 percent and less than about 1 percent by weight.

2. The radiopaque stent of claim 1, wherein the cobalt-chromium alloy comprises chromium in an amount from about 10% to about 25% by weight of the cobalt-chromium alloy.

3. The radiopaque stent of claim 1, wherein the cobalt-chromium alloy comprises no more than 1% molybdenum by weight.

4. The radiopaque stent of claim 1, wherein the cobalt-chromium alloy is entirely free of molybdenum.

5. The radiopaque stent of claim 1, wherein the tubular body comprises a single tube.

6. The radiopaque stent of claim 1, wherein the entirety of the tubular body is fabricated from the cobalt-chromium alloy comprising cobalt, chromium, and the radiopaque element.

7. The radiopaque stent of claim 1, wherein the tubular body comprises one or more wire elements welded together that are made from the cobalt-chromium alloy.

8. A radiopaque stent, comprising:

a tubular body comprising a cobalt-chromium alloy including cobalt and chromium, the cobalt-chromium alloy including tungsten as a radiopaque element, the radiopaque element being more than 20 percent to about 30 percent by weight of the cobalt-chromium alloy;

wherein the cobalt-chromium alloy further comprises manganese in a concentration of up to about 5% by weight and further includes molybdenum, silicon, phosphorus, carbon, and sulfur, each being present in a concentration of greater than 0and less than about 1% by weight.

9. The radiopaque stent of claim 8, wherein the cobalt-chromium alloy comprises chromium in an amount from about 10% to about 25% by weight of the cobalt-chromium alloy.

10. The radiopaque stent of claim 8, wherein the tubular body comprises a single tube.

11. The radiopaque stent of claim 8, wherein the entirety of the tubular body is fabricated from the cobalt-chromium alloy comprising cobalt, chromium, and the radiopaque element.

12. The radiopaque stent of claim 8, wherein the tubular body comprises one or more wire elements welded together that are made from the cobalt-chromium alloy.

13. The radiopaque stent of claim 8, wherein the cobalt-chromium alloy is substantially free of molybdenum.

14. The radiopaque stent of claim 8, wherein the cobalt-chromium alloy comprises no more than 1% molybdenum by weight.

15. A radiopaque stent, comprising:

an elongate, tubular body comprising a cobalt-chromium alloy including cobalt and chromium, the cobalt-chromium alloy including one or more radiopaque elements comprising tungsten, the tungsten element being about 25 percent by weight of the total cobalt-chromium alloy;

wherein the cobalt-chromium alloy further comprises manganese in a concentration of up to about 5% by weight and further includes molybdenum, silicon, phosphorus, carbon, and sulfur, each being present in a concentration of greater than 0 and less than about 1% by weight.

16. The radiopaque stent of claim 15, wherein the tungsten comprises about 30 percent by weight of the cobalt-chromium alloy.