Composite stent with regioselective material and a method of forming the same

• US 7,169,173 B2
• Filed: 09/22/2003
• Issued: 01/30/2007
• Est. Priority Date: 06/29/2001
• Status: Expired due to Fees

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Mirzaee, Daryush, Padilla, Orlando, Hossainy, Syed F. A.
• Primary Examiner(s): HO, UYEN T
• Application Number:
  US10/668,781
• Publication Number:
  US 20040098117A1
• Time in Patent Office: 1,226 Days
• Field of Search: 623/1.46, 623/1.23, 623/1.12, 623/1.13, 623/1.36, 623/1.15, 623/1.42
• 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 2/915 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 stent, comprising:

a body having a first end and a second end and a middle segment between the first and second ends; and

a plurality of polymeric strips circumferentially spaced from each other around the body of the stent, wherein the plurality of polymeric strips are disposed at or adjacent to the first and/or second end of the stent and do not extend into the middle segment of the body, wherein the plurality of strips have a modulus of elasticity lower than the body of the stent, and wherein the plurality of polymeric strips are in contact with the body of the stent.

2. The stent of claim 1, wherein the plurality of polymeric strips include a drug.

3. The stent of claim 1, wherein the plurality of polymeric strips include a bioabsorbable material.

4. The stent of claim 3, wherein the bioabsorbable material is selected from the group consisting of hyaluronic acid, water soluble chondroitin sulfate, poly(ethylene glycol), poly(vinyl pyrrolidine), poly(caprolactone-co-ethylene glycol), poly(lactic acid-co-ethylene glycol), polybutylene terephthalate and poly alpha-hydroxy acids.

5. The stent of claim 2, wherein the drug is selected from the group consisting of anti-proliferative drugs, anti-platelet drugs, TB3A inhibitors and nitric oxide donors.