Permanent stent made of a cross linkable material

• US 5,334,201 A
• Filed: 03/12/1993
• Issued: 08/02/1994
• Est. Priority Date: 03/12/1993
• Status: Expired due to Fees

• Current Assignee: Kevin P. Cowan
• Original Assignee: Kevin P. Cowan
• Inventors: Cowan, Kevin P.
• Primary Examiner(s): SHAY, RANDY CITRIN
• Application Number:
  US08/030,977
• Time in Patent Office: 508 Days
• Field of Search: 623/1, 623/66, 600/36, 606/194
• US Class Current: 623/1.21
• 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 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61L 31/06 obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds A61L31/041 takes precedence
• CPC Class Codes: A61L 31/10 Macromolecular materials
• CPC Class Codes: C08L 75/04 Polyurethanes
• CPC Class Codes: C08L 83/04 Polysiloxanes

Abstract

An improved vascular reinforcing stent for use in angioplasty which comprises a sleeve tubular stent of a cross-linkable substance that is completely encapsulated within a biologically compatible film and a process for using such a stent.

Claims

1. An endovascular stent for resisting restenosis in a stenosed region of a blood vessel that has been expanded by balloon angioplasty, said stent comprising:

a stent sleeve having an expandable tubular body portion containing a cross-linkable substance at least a portion of which can be cured by exposure to radiation, and a film of material which is biologically compatible with the vessel and encapsulating such tubular body portion to thereby isolate it from the vessel.

2. A stent as defined in claim 1 wherein said cross-linkable substance is selected from the group consisting of epoxys and urethanes.

3. A stent as defined in claim 2 wherein said cross-linkable substance is a polyurethane oligomer mixture.

4. A stent as defined in claim 3, wherein said encapsulating film of material is impregnated with an antithrombogenic agent.

5. A stent as defined in claim 2, wherein said encapsulating film is constructed of an elastic substance that remains integral during expansion of said tubular body portion.

6. A stent as defined in claim 1 wherein such tubular body portion contains a plurality of longitudinally disposed filaments composed of a noble metal.

7. A stent as defined in claim 6 wherein said elastic substance is a medical grade of silicone.

8. A stent as defined in claim 1 wherein said encapsulating film is constructed of an elastic substance that remains integral during expansion of said tubular body portion.

9. A stent as defined in claim 1 wherein said encapsulating film of material is impregnated with an antithrombogenic agent.

10. A stent as defined in claim 1 wherein said stent sleeve comprises a plurality of separate pockets that extend substantially parallel with respect to each other along said tubular body portion.