Composite stent with regioselective material

• US 20070116856A1
• Filed: 12/18/2006
• Published: 05/24/2007
• Est. Priority Date: 06/29/2001
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Original Assignee: Advanced Cardiovascular Systems Incorporated (Abbott Laboratories)
• Inventors: Hossainy, Syed, Mirzaee, Daryush, Padilla, Orlando
• Granted Patent: US 8,025,916 B2
• Time in Patent Office: Days
• US Class Current: 427/2.240
• 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 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2230/0013 Horseshoe-shaped, e.g. crescent-shaped, C-shaped, U-shaped
• CPC Class Codes: A61F 2230/0076 ellipsoidal or ovoid
• CPC Class Codes: A61F 2250/0018 differing in elasticity, stiffness or compressibility
• CPC Class Codes: A61L 2300/606 Coatings
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: A61L 31/16 Biologically active materials, e.g. therapeutic substances A61L31/047 takes precedence
• CPC Class Codes: Y10S 623/916 Blood vessel

Abstract

A composite stent and a method for making the same are provided.

Claims

1. A method of forming a coating on a stent, comprising:

applying a solution to a stent, the stent being made from a first material, wherein the solution comprises a second material having a creep compliance of about 0.5 GPa<sup>−

1</sup> to about 10.0 GPa<sup>−

1</sup>; and

solidifying the second material on the stent.

2. The method of claim 1, wherein the solution is applied to a region that is substantially adjacent to an end of the stent.

3. The method of claim 1, wherein a modulus of elasticity of the second material is lower than a modulus of elasticity of the first material.

4. The method of claim 1, wherein applying the solution comprises dripping the solution onto the stent.

5. The method of claim 1, wherein the solution includes a therapeutic agent.

6. A method of forming a coating on a stent, comprising:

applying a solution including a first material onto a stent, the stent being made from a second material, wherein a modulus of elasticity of the first material is lower than a modulus of elasticity of the second material; and

solidifying the first material on the stent.

7. The method of claim 6, wherein applying the solution comprises dripping the solution onto the stent.

8. The method of claim 6, wherein the solution is applied to a region that is substantially adjacent to an end of the stent.