Hybrid amorphous metal alloy stent

• US 20060178727A1
• Filed: 03/15/2006
• Published: 08/10/2006
• Est. Priority Date: 12/03/1998
• Status: Abandoned Application

• Current Assignee: Medinol Limited (Medinol USA Incorporated)
• Original Assignee: Medinol Limited (Medinol USA Incorporated)
• Inventors: Richter, Jacob
• Application Number:
  US11/377,769
• Publication Number:
  US 20060178727A1
• Time in Patent Office: Days
• US Class Current: 623/1.220
• CPC Class Codes: A61F 2/07 Stent-grafts
• 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 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2210/0004 bioabsorbable
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61L 31/022 Metals or alloys
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: C08L 27/18 Homopolymers or copolymers or tetrafluoroethene

Abstract

An expandable stent is provided, wherein the stent is advantageously formed of at least one amorphous metal alloy and a biocompatible material. The stent is formed from flat metal in a helical strip which is wound to form a tubular structure. The tubular structure is not welded but rather is wrapped or coated with a biocompatible material in order to maintain the amorphous metal in its tubular configuration. Said stent can be balloon expanded or self expanding.

Claims

1. A stent comprising:

a helically coiled flat metal pattern having an amorphous metal alloy composition; and

a biocompatible material layer around the coiled amorphous metal alloy composition.

2. The stent according to claim 1, wherein the flat metal pattern is a helical strip.

3. The stent according to claim 1 wherein the biocompatible material layer is a porous material.

4. The stent according to claim 1 wherein the biocompatible material layer is biodegradable.

5. The stent according to claim 1 wherein the biocompatible material layer is expanded polytetrafluoroethylene (ePTFE).

6. The stent according to claim 1 wherein the amorphous metal alloy comprises an Fe—

Cr—

B—

P alloy.

7. The stent according to claim 1 wherein the amorphous metal alloy contains silicon.

8. The stent according to claim 1 further comprising a drug coating.

9. The stent according to claim 8 wherein the biocompatible material is biodegradable.

12. The stent of claim 1, wherein the stent is a coiled strip having cells.

13. The stent of claim 12, wherein the cells have side walls that are serpentine.

10. A method of making a flat metal stent comprising:

rolling a flat metal strip having a serpentine pattern into a tubular structure, wherein the flat metal strip comprises at least one amorphous metal alloy; and

covering at least a portion of the tubular structure with a biocompatible material.

11. The method of claim 10, wherein the biocompatible material is expanded polytetrafluoroetlyene (ePTFE).

14. A stent comprising:

an amorphous metal alloy strip helically wound into a series of coiled windings, wherein the strip has at least two side bands, each formed in a serpentine pattern having a series of bends; and

a biocompatible material covering at least a portion of the coiled windings.

15. The stent according to claim 14 wherein the biocompatible material layer is expanded polytetrafluoroethylene (ePTFE).

16. The stent according to claim 14 wherein the amorphous metal alloy comprises an Fe—

Cr—

B—

P alloy.

17. The stent according to claim 14 wherein the amorphous metal alloy contains silicon.

18. The stent according to claim 14 further comprising a drug coating.

19. The stent according to claim 14 wherein the biocompatible material is biodegradable.

20. The stent according to claim 14 wherein the biocompatible material is a fiber mesh.