Prosthesis for abdominal aortic aneurysm repair

• US 6,312,462 B1
• Filed: 09/22/1999
• Issued: 11/06/2001
• Est. Priority Date: 09/22/1999
• Status: Expired due to Term

• Current Assignee: Bard Peripheral Vascular Incorporated (Becton, Dickinson & Co)
• Original Assignee: IMPRA Incorporated (Becton, Dickinson & Co)
• Inventors: Layne, Richard W., Renzi, David, Banas, Christopher E., McDermott, John D.
• Primary Examiner(s): Willse, David H.
• Assistant Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US09/401,436
• Time in Patent Office: 776 Days
• Field of Search: 623/1.24, 623/1.25, 623/1.27, 623/1.29, 623/1.35, 623/1.44, 623/1.49
• US Class Current: 623/1.25
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2220/005 using adhesives
• 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 2230/0019 rectangular
• CPC Class Codes: A61F 2250/0003 having an inflatable pocket filled with fluid, e.g. liquid or gas

Abstract

The device of the present invention comprises a bifurcated graft fabricated from expanded PTFE (ePTFE). The inventive device is double walled so that following insertion into an aneurysm, fluid can be injected between the walls to expand the device thereby opening the inner tubular graft for receiving blood flow and locking the device into place in the aorta. The injected fluid may polymerize so that the device is permanently held in its expanded form. One embodiment of the device is fabricated with pockets or channels. After the device is delivered and expanded additional stiffening struts can be inserted into these pockets. In this way the basic device can be furled and tightly compressed for delivery (something not possible with a stent containing device). After the device is expanded, a stent-like structure can be inserted endovascularly giving the strength and resiliency of a stent-containing prosthesis.

Claims

1. A prosthetic device for endovascular repair of an aneurysm comprising:

a first expanded polytetrafluoroethylene tubular member;

a second expanded polytetrafluoroethylene tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof, wherein said tubular members are bifurcated into tubular iliac limbs at said distal end; and

port means for injection of an inflating fluid into the space between said tubular members.

2. A prosthetic device for endovascular repair of an aneurysm comprising:

a first expanded polytetrafluoroethylene tubular member;

a second expanded polytetrafluoroethylene tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof; and

port means for injection of an inflating fluid into the space between said tubular members, wherein said port means includes an inflation conduit and a valve mechanism, wherein said inflation conduit is removably attached to said tubular members.

3. A prosthetic device for endovascular repair of an aneurysm comprising:

a first expanded polytetrafluoroethylene tubular member;

a second expanded polytetrafluoroethylene tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof;

port means for injection of an inflating fluid into the space between said tubular members; and

a plurality of contact points crossing the space, said contacts points formed by said first tubular member being laminated directly to said second tubular member, wherein said contact points are arranged circumferentially.

4. A prosthetic device for endovascular repair of an aneurysm comprising:

a first expanded polytetrafluoroethylene tubular member;

a second expanded polytetrafluoroethylene tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof;

port means for injection of an inflating fluid into the space between said tubular members; and

a plurality of contact points crossing the space, said contacts points formed by said first tubular member being laminated directly to said second tubular member, wherein said contact points are arranged helically.

5. A prosthetic device for endovascular repair of an aneurysm comprising:

an expanded polytetrafluoroethylene component comprising;

a first expanded polytetrafluoroethylene tubular member;

a second expanded polytetrafluoroethylene tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof;

port means for injection of an inflating fluid into the space between said tubular members; and

a plurality of longitudinally oriented chambers disposed between said first tubular member and said second tubular member and separated from the space formed by a plurality of laminations between said first tubular member and said second tubular member; and

a plurality of stiffening members inserted into said chambers after the inflating fluid has been injected into the space.

6. The prosthetic device according to claim 5, wherein said expanded polytetrafluoroethylene component is bifurcated into tubular iliac limbs at said distal end.

7. The prosthetic device according to claim 5, wherein said port means includes an inflation conduit and a valve mechanism, wherein said inflation conduit is removably attached to said expanded polytetrafluoroethylene component.

8. A method for inserting the prosthetic device of claim 5 into an aneurysm comprising the steps of:

compressing the expanded polytetrafluoroethylene component;

placing the compressed component into a catheter;

using the catheter to endovascularly insert said compressed component into an aneurysm;

inflating the compressed component by injecting inflating fluid through the port means; and

inserting the stiffening members into the chambers.

9. A prosthetic device for endovascular repair of an aneurysm comprising:

a first tubular member;

a second tubular member coaxial with and of a diameter larger than a diameter of said first tubular member so that a space is formed therebetween, said first and second tubular members sealingly attached at proximal and distal ends, thereof; and

a plurality of chambers disposed between said first tubular member and said second tubular member and formed from the space by a plurality of laminations between said first tubular member and said second tubular member, said chambers sized and structured for insertion of stiffening members after said device is placed into an aneurysm.

10. A method for inserting the prosthetic device of claim 9 into an aneurysm comprising the steps of:

compressing the device;

placing the compressed device into a catheter;

using the catheter to endovascularly insert said compressed device into an aneurysm;

expanding the compressed device within the aneurysm; and

inserting the stiffening members into the chambers.