Methods for applying a covering layer to a stent

• US 6,375,787 B1
• Filed: 04/22/1996
• Issued: 04/23/2002
• Est. Priority Date: 04/23/1993
• Status: Expired due to Term

• Current Assignee: Schneider (Europe) GmbH (Boston Scientific Corporation), Schneider (Europe) AG
• Original Assignee: Schneider (Europe) GmbH (Boston Scientific Corporation)
• Inventors: Lukic, Goran
• Primary Examiner(s): Maki, Steven D.
• Application Number:
  US08/636,206
• Time in Patent Office: 2,192 Days
• Field of Search: 156/144, 156/165, 156/294, 156/307.3, 156/308.2, 623/1, 623/12, 623/13, 623/1.44, 606/191, 606/194
• US Class Current: 156/294
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/072 Encapsulated stents, e.g. wire or whole stent embedded in lining
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable

Abstract

The stent comprises a cylindrical wall formed by meshed wires and a covering layer of elastic material extending on a portion of its length, with an outer surface, and totally embracing the wire mesh.

Claims

1. A method for applying a covering layer to a stent comprising:

(a) forming a tube made out of an elastomeric polymerisable composition;

(b) radially contracting the stent;

(c) inserting into the tube at least a portion of the stent; and

(d) radially expanding at least the portion of the stent in the tube or allowing at least the portion of the stent to expand in the tube, and chemically bonding at least the portion of the stent and the tube together.

2. A method for applying a covering layer to a stent comprising:

(a) forming a tube made out of an elastomeric polymerisable composition, the tube having an inside;

(b) coating the inside of the tube with an adhesive medium;

(c) providing a stent having at least one portion along its length, and radially contracting the stent;

(d) inserting into the tube at least one portion of the stent;

(e) radially expanding the at least one portion of the stent in the tube or allowing the at least one portion of the stent to expand in the tube; and

(f) curing the adhesive medium between the inside of the tube and the at least one portion of the stent in the tube.

3. A method for applying a covering layer to a stent comprising:

(a) forming a tube from an elastomeric polymerisable composition, the tube having an inside;

(b) preparing an elastomeric composition dissolved in a solvent;

(c) coating the inside of the tube with the elastomeric composition dissolved in the solvent;

(d) providing a stent having at least one portion along its length, and radially contracting the stent;

(e) inserting into the tube at least one portion of the stent;

(f) radially expanding the at least one portion of the stent in the tube or allowing the at least one portion of the stent to radially expand in the tube;

(g) evaporating the solvent; and

(h) polymerizing the elastomeric composition between the inside of the tube and the at least one portion of the stent in the tube.

4. A method for covering a stent comprising:

(a) forming a polymeric tube having an inner surface;

(b) inserting a contracted stent into the tube, the stent having an inner surface and an outer surface;

(c) radially expanding the stent or allowing the stent to radially expand in the tube so that at least part of the stent outer surface makes contact with at least part of the tube inner surface; and

(d) chemically bonding at least a part of the outer surface of the stent to the inner surface of the tube.

5. A method for covering a stent comprising:

(a) forming a polymeric tube having an inner surface;

(b) coating the inner surface of the tube with an adhesive medium;

(c) inserting a contracted stent into the tube;

(d) radially expanding the stent in the tube or allowing the stent to radially expand in the tube; and

(e) curing the adhesive medium or allowing the adhesive medium to cure.

6. A method for covering a stent comprising:

(a) forming a polymeric tube, the tube having an inner surface;

(b) coating at least a part of the inside of the tube with a polymerisable composition;

(c) inserting a contracted stent into the tube, the stent having an inner surface and an outer surface;

(d) radially expanding the stent in the tube or allowing the stent to radially expand in the tube; and

(e) polymerizing the polymerisable composition.