Stent graft having improved attachment within a body vessel

• US 6,482,227 B1
• Filed: 11/16/2000
• Issued: 11/19/2002
• Est. Priority Date: 03/30/1998
• Status: Expired due to Term

• Current Assignee: Cardinal Health Switzerland 515 GmbH (Cardinal Health, Inc.), Ethicon Endo-Surgery, Inc. (Johnson & Johnson)
• Original Assignee: Cordis Corporation (Cardinal Health, Inc.)
• Inventors: Solovay, Kenneth S.
• Primary Examiner(s): McDermott, Corrine
• Assistant Examiner(s): STEWART, ALVIN J
• Application Number:
  US09/714,079
• Time in Patent Office: 733 Days
• Field of Search: 623/1.11, 623/1.13, 623/1--, 623/1.35, 623/1.1, 623/1.38, 623/1.39, 623/1.4, 623/1.46, 623/1.47, 623/1.49, 623/1.41
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/89 the wire-like elements comprising two or more adjacent rings flexibly connected by separate members
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2230/0054 V-shaped

Abstract

In accordance with the present invention there is provided an improved stent graft for insertion into a body vessel of a patient. The stent graft includes a hollow substantially cylindrical stent comprising a plurality of interconnected struts. In addition, the stent graft includes a graft material attached to the stent, wherein the graft material is an open cell foam material having a multiplicity of cells having an average diameter ranging from about 100-500 micrometers, and a cell density on a surface thereof ranging from about 50-100 cells per inch.

Claims

1. An improved stent graft for insertion into a body vessel of a patient, said stent graft comprising:

a. a hollow substantially cylindrical radially expandable stent comprising a plurality of interconnected struts;

b. a graft material attached to said stent, said graft material comprising an open cell foam material having a multiplicity of cells having an average diameter ranging from about 100-500 micrometers, and a cell density on a surface thereof ranging from about 50-100 cells per inch.

2. The stent graft according to claim 1 wherein said open cell foam material has a density ranging from about 1.5-2.5 pounds per cubic foot.

3. The stent graft according to claim 1 wherein said open cell foam material comprises polyurethane.

4. The stent graft according to claim 1 wherein said stent is a self expanding stent.

5. The stent graft according to claim 4 wherein said stent is made from a superelastic nickel titanium alloy.

6. An improved stent graft for insertion into a body vessel of a patient, said stent graft comprising:

a. a hollow substantially cylindrical radially expandable stent having a body comprising a plurality of interconnected struts, and two open ends;

b. a graft material attached to and covering a predetermined portion of said body of said stent, said graft material comprising an open cell foam material having a multiplicity of cells having an average diameter ranging from about 100-500 micrometers, and a cell density on a surface thereof ranging from about 50-100 cells per inch.

7. The stent graft according to claim 6 wherein said open cell foam material has a density ranging from about 1.5-2.5 pounds per cubic foot.

8. The stent graft according to claim 6 wherein said open cell foam material comprises polyurethane.

9. The stent graft according to claim 6 wherein said stent is a self expanding stent.

10. The stent graft according to claim 9 wherein said stent is made from a superelastic nickel titanium alloy.

11. The stent graft according to claim 6 wherein said graft material further covers a predetermined portion of one of said ends of said stent.