Intraluminal stent and graft

• US 5,683,448 A
• Filed: 11/23/1994
• Issued: 11/04/1997
• Est. Priority Date: 02/21/1992
• Status: Expired due to Term

• Current Assignee: Lifeport Sciences LLC (Acacia Research Corporation)
• Original Assignee: Boston Scientific Technology Incorporated (Boston Scientific Corporation)
• Inventors: Cragg, Andrew H.
• Primary Examiner(s): Polutta, Mark O.
• Application Number:
  US08/344,524
• Time in Patent Office: 1,077 Days
• Field of Search: 623/1, 623/12, 623/11, 606/108, 606/191, 606/192, 606/194, 606/195, 606/198
• US Class Current: 623/1.13
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/95 Instruments specially adapted for placement or removal of stents or stent-grafts
• CPC Class Codes: A61F 2/966 with relative longitudinal movement between outer sleeve and prosthesis, e.g. using a push rod
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/30462 retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2210/0019 operated at only one temperature whilst inside or touching the human body, e.g. constrained in a non-operative shape during surgery, another temperature only occurring before the operation
• CPC Class Codes: A61F 2220/0066 stapled
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2310/00017 Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00131 Tantalum or Ta-based alloys
• CPC Class Codes: A61L 2400/16 Materials with shape-memory or superelastic properties
• 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: C08L 67/00 Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain of polyester-amides C08L77/12; of polyester-imides C08L79/08; Compositions of derivatives of such polymers

Abstract

An intraluminal stent and graft includes a stent made of a continuous helix of zig-zag wire and loops which connect adjacent apices of the wire. The stent is compressible and self-expandable substantially to a pre-compressed configuration. The device also includes a graft secured to the stent and made of a suitable biocompatible material.

Claims

1. An intraluminal stent and graft apparatus comprising:

a stent member and a tubular graft member secured to the stent member;

said stent member is compressible and expandable substantially to a pre-compressed configuration, said stent member being made of a predetermined length of wire having a zig-zag configuration with apices and defining a plurality of hoops disposed in succession along a common axis, wherein axially oppositely disposed apices of adjacent hoops abut one another, and wherein said apparatus further comprises a plurality of loop members for connecting abutting apices of adjacent hoops.

2. The apparatus of claim 1, wherein said graft member is made of fabric.

3. The apparatus of claim 2, wherein the fabric is formed with polyester yarn and has a thickness of 0.2 mm or less.

4. The apparatus of claim 1 wherein said wire is continuous.

5. The apparatus of claim 1, wherein the stent member defines a lumen and the graft member lies within the lumen.

6. An intraluminal stent and graft apparatus as claimed in claim 1, wherein said graft member is made of a fabric formed with polyester yarn and has a thickness of 0.2 mm or less and a water permeability of between 50 and 500 ml/cm² /min at 16 KPa.

7. The apparatus of claim 1 wherein said wire is a shape memory alloy.

8. The apparatus of claim 7 wherein said shape memory alloy is nitinol.

9. The apparatus of claim 1, wherein the graft member lies outside of the stent member.

10. The apparatus of claim 9, wherein the graft member is secured to the stent member with at least one loop member.

11. An intraluminal stent and graft apparatus comprising:

a stent member and a tubular graft member, secured to the stent member, wherein;

(a) said stent member is compressible and expandable substantially to a pre-compressed configuration;

(b) said stent member comprises a plurality of hoops disposed along a common axis, each said hoop comprised of a succession of zig-zag segments lying in the circumference of said hoop and having apices at the axial limits thereof; and

(c) the apices of axially oppositely disposed zig-zags in adjacent hoop members abut one another and at least some of the abutting apices are connected to one another by a separate connecting member.

12. The intraluminal stent and graft apparatus as claimed in claim 11 wherein said stent member is made of wire and defines a lumen and said graft member lies within said lumen.

13. The intraluminal stent and graft apparatus as claimed in claim 11 wherein said graft member is a fabric formed with polyester yarn and has a thickness of 0.2 mm or less and a water permeability of between 50 and 500 ml/cm² /min at 16 KPa.

14. The intraluminal stent and graft apparatus as claimed in claim 11 wherein said graft member is fabric.

15. The intraluminal stent and graft apparatus as claimed in claim 14 wherein said fabric is polyester and has a thickness of 0.2 mm or less.

16. The apparatus of claim 11 wherein said plurality of hoops are formed of a continuous member.

17. The apparatus of claim 11, wherein the graft member lies around the outside of the stent member.

18. The apparatus of claim 17, wherein the graft member is secured to the stent member with at least one loop member.