Aortic graft, implantation device, and method for repairing aortic aneurysm

• US 5,207,695 A
• Filed: 11/04/1991
• Issued: 05/04/1993
• Est. Priority Date: 06/19/1989
• Status: Expired due to Term

• Current Assignee: EMI (Entegris Incorporated)
• Original Assignee: Hugh H. Trout III
• Inventors: Trout, Hugh H. III
• Primary Examiner(s): PREBILIC, PAUL B
• Application Number:
  US07/787,731
• Time in Patent Office: 547 Days
• Field of Search: 623/1, 623/12, 606/153, 606/191, 606/198, 606/200, 600/36, 600/37
• US Class Current: 623/1.36
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/848 having means for fixation to the vessel wall, e.g. barbs
• 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 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2220/0016 with sharp anchoring protrusions, e.g. barbs, pins, spikes
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers

Abstract

An aortic graft and system and method for implanting the aortic graft are provided. The aortic graft comprises a substantially cylindrical graft material with attachment means which comprise a plurality of post and hook assemblies which are implanted with a double catheter system to penetrate the aorta wall above and below the aneurysm to provide firm attachment of the aortic graft and, thereby, exclude the aneurysm from the circulatory system.

Claims

1. An aortic graft for performing an aortic anastomosis on a section of aorta, comprising,

flexible aortic graft means, having cephalic and caudal ends, and having axial axis and radial direction,

a plurality of attachment means attached to said cephalic and caudal ends of said aortic graft means for securing said aortic graft means to the aorta, each of said attachment means having

base means, oriented in substantially parallel relation to said axis of said aortic graft means, and attached to said aortic graft means,

post means, attached to said base means, extending radially away from said aortic graft means, and orientated in substantially perpendicular relation to said axis,

hook means oriented in substantially parallel relation to said axis, mounted to the distal end of said post means for penetrating the aorta and securing said graft means to the aorta,

wherein said attachment means places said aortic graft means in circumferential apposition to the aorta to prevent substantial leakage between said aortic graft means and the aorta.

2. The aortic graft of claim 1, wherein said aortic graft means is subtantially cylindrical in shape.

3. The aortic graft of claim 1, wherein said aortic graft means comprises a resilient flexible material.

4. The aortic graft of claim 1, wherein said aortic graft means comprises a material inert to bodily fluids.

5. The aortic graft of claim 1, wherein said hook means further comprises barbed hooks.

6. The aortic graft of claim 1, wherein said aortic graft means further comprises retainer means for maintaining said cephalic and caudal ends of said aortic graft in mated relation with abutting portions of the aorta.

7. An aortic graft, adapted to be implanted by means of a balloon catheter for performing an aortic anastomosis on a section of abdominal aorta, comprising,

substantially cylindrical flexible aortic graft means, having first and second ends,

a plurality of attachment means attached to said first and second ends of said aortic graft means for securing said aortic graft means to the aorta,

each of said attachment means having

a base member attached to said aortic graft means at one of said first or second ends thereof, oriented in substantially parallel relation to the axial axis of said aortic graft means,

post means, attached in substantially perpendicular relation to said base member and extending radially from said aortic graft means,

hook means attached to the distal end of said post means for penetrating the aorta and securing said graft means to the aorta,

said hook means further comprising a barbed hook,

wherein said attachment means places said aortic graft means in circumferential apposition to the aorta to prevent substantial leakage between said aortic graft means and the aorta, and

wherein said aortic graft is adapted to be implanted by use of said balloon catheter means.

8. The aortic graft of claim 7, wherein said aortic graft means comprises a resilient flexible material.

9. The aortic graft of claim 7, wherein said aortic graft means comprises a material inert to bodily fluids.

10. The aortic graft of claim 7, wherein said aortic graft means further comprises retainer means for maintaining said first and second ends in mated relation with adjoining portions of the aorta.

11. An aortic graft, adapted to be implanted by means of a balloon catheter, for performing an aortic anastomosis on a section of abdominal aorta, comprising,

substantially cylindrical, flexible, aortic graft means, having first and second ends and having axial and radial directions,

a plurality of attachment means disposed at said first and second ends of said aortic graft means for securing said aortic graft means to the aorta,

each of said attachment means having

a base member abutting a surface of said aortic graft at one of said first or second ends of said aortic graft, said base member oriented in substantially parallel relation to the longitudinal axis of said aortic graft,

post means, attached in substantially perpendicular relation to said base member and extending through one of said first or second ends of said aortic graft radially from said aortic graft,

hook means, attached to the distal end of said post means for penetrating the aorta and securing said aortic graft to the aorta,

said hook means further comprising at least one barb,

retainer means for maintaining said first and second ends of said aortic graft means in mated relation with adjoining portions of the aorta,

wherein said attachment means and said retainer means cooperate to place said aortic graft means in circumferential apposition to the aorta to prevent substantial leakage between said aortic graft and the aorta, and

wherein said aortic graft is adapted to be implanted in the aorta by use of said ballon catheter means.

12. The aortic graft of claim 11, wherein said aortic graft means comprises a resilient flexible material.

13. The aortic graft of claim 11, wherein said retainer means is in the form of a ring, and comprises a series of short segments which ratchet past one another to resiliently maintain the diameter of said retainer means.

15. The aortic graft of claim 11, wherein said retainer means is a resilient mesh web.

16. The aortic graft of claim 11, wherein each said hook means is substantially parallel to the base member, and where the barbs are oriented towards the base member and away from the aorta.

17. The aortic graft of claim 11, wherein said hook means has a first and second tip, where the barb is located on said first tip, wherein said first tip is longer than said second tip, as measured from said post means.

14. A process for repairing an aortic aneurysm through the use of a ballon catheter and aortic graft comprising the steps of,

inserting a contrast filled ballon catheter into the aneurysm to a cephalic point, just above the aneurysm abutting unaffected arterial tissue;

measuring to diameter and position of the aorta at the cephalic point, just above the aneurysm;

withdrawing the contrast filled ballon catheter system from said cephalic point;

repositioning the contrast filled balloon catheter in the affected artery to a caudal point, below the aneurysm abutting unaffected arterial tissue;

reinflating the contrast filled balloon;

measuring to diameter and position of the aorta at said distal point, just below the aneurysm;

removing the contrast filled balloon catheter;

measuring the distance between said cephalic and caudal points through radiographic techniques;

inserting along with a double ballon catheter a graft having first and second ends substantially 1-10 mm larger than the size of the aorta at said cephalic and cuadal points;

inflating the cephalic ballon from the distal end of the cephalic balloon to force hooks at the distal postion of the proximal end of said graft into mated relation with said cephalic aorta;

continuing to blow up said cephalic balloon from said distal end of said cephalic balloon until said cephalic balloon is fully inflated and said proximal hooks are forced into mated relation with said artery at said cephalic point;

maintaining inflation of said cephalic balloon while inflating caudal balloon;

inflating said caudal balloon from the proximal end of said caudal balloon to force hooks at said proximal position of said caudal end of said graft into mated relation with said aorta at said caudal point;

continuing to inflate said caudal balloon from said proximal end of said caudal balloon until said caudal balloon is fully inflated and said caudal hooks are forced into mated relation with said artery at said caudal point;

removing the double balloon catheter system;

inserting into said graft one or more retainers and a third balloon catheter system;

implanting retainers at said cephalic and caudal positions inside aortic said graft;

removing all catheters and wires;

repairing all arterial incisions; and

closing incision used to access femoral or iliac artery.