Bifurcated aneurysm treatment arrangement

• US 20070198075A1
• Filed: 12/23/2006
• Published: 08/23/2007
• Est. Priority Date: 12/23/2005
• Status: Abandoned Application

• Current Assignee: Elad Levy
• Original Assignee: Elad Levy
• Inventors: Levy, Elad
• Application Number:
  US11/645,249
• Publication Number:
  US 20070198075A1
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/1214 Coils or wires
• CPC Class Codes: A61B 17/12168 having a mesh structure A61B17/1214 takes precedence
• CPC Class Codes: A61B 17/12186 liquid materials adapted to be injected
• CPC Class Codes: A61B 2017/12063 electrolytically detachable
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/077 having means to fill the space between stent-graft and aneurysm wall, e.g. a sleeve
• CPC Class Codes: A61F 2002/3008 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2002/30668 Means for transferring electromagnetic energy to implants
• CPC Class Codes: A61F 2002/8486 provided on at least one of the ends
• CPC Class Codes: A61F 2002/9665 with additional retaining means
• CPC Class Codes: A61F 2230/0071 spherical
• CPC Class Codes: A61F 2250/0001 Means for transferring electromagnetic energy to implants
• CPC Class Codes: A61F 2250/0017 differing in yarn density
• CPC Class Codes: A61F 2250/0048 differing in mechanical expandability, e.g. in mechanical, self- or balloon expandability
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61F 2310/00023 Titanium or titanium-based alloys, e.g. Ti-Ni alloys
• CPC Class Codes: A61F 2310/00562 : Coating made of platinum or Pt-based alloys
• CPC Class Codes: A61F 2310/00568 : Coating made of gold or Au-based alloys
• CPC Class Codes: A61F 2310/0097 : Coating or prosthesis-covering structure made of pharmaceutical products, e.g. antibiotics

Abstract

A vascular aneurysm-treating stent arrangement having a proximal end and a distal end, the stent being formed of a differentially expandable material, wherein the distal end is deformably expandable to a cone shape. A deformable enclosed chamber is arranged on the distal end of the stent and nests within the aneurysm. A different embolic agent is introduced into the aneurysm and into the chamber.

Claims

1. A vascular aneurysm treating stent arrangement having a proximal end and a distal end, said stent being formed of a differentially expandable material, wherein said distal end is deformably expandable to a cone shape;

a deformable enclosed chamber arranged on said distal end of said stent.

2. The stent arrangement s recited in claim 1, wherein said deformable chamber has an expandable foraminous floor arranged thereon.

3. The stent arrangement as recited in claim 2, wherein said chamber has wall portions with a smaller opening pattern arranged therethrough.

4. The stent arrangement as recited in claim 1, wherein the stent device is comprised of a woven material.

5. The stent arrangement as recited in claim 1, wherein said stent has a severable tether arranged in its proximal end.

6. A method of treating a bifurcated aneurysm having a neck portion, into a body vessel, comprising:

introducing a stent assembly into said body vessel, said stent having a body portion and a distal chamber on said body portion;

inserting said chamber into said aneurysm;

expanding said chamber to a known dimension and volume.

7. The method as recited in claim 6, including the step of:

introducing a first delivery catheter through said body portion of said stent and through said chamber and into said aneurysm.

8. The method as recited in claim 7, including the step of:

injecting an first embolic material into said aneurysm.

9. The method as recited in claim 8, including the step of:

removing said first delivery catheter from said aneurysm and introducing a second delivery catheter through said body portion of said stent and into said chamber;

injecting a known quantity of a second embolic material into said chamber, completely filling said chamber.

10. The method as recited in claim 6, including the step of:

nesting said chamber within said neck portion of said aneurysm.

11. The method as recited in claim 10, including the step of:

opening a strut arrangement into said aneurysm to secure said chamber within said aneurysm.

12. The method as recited in claim 10, including the step of:

placing a floor in a proximal portion of said chamber to segregate said second embolic material from said body vessel.

13. The method as recited in claim 6, including the step of:

expanding a distal portion of said stent body into a cone shape.

14. The method as recited in claim 13, including the step of:

expanding said chamber into a known volume within said aneurysm simultaneously with said expansion if said stent body.

15. A vascular aneurysm treating stent arrangement having a proximal end and a distal end, said distal end having a larger pattern of openings therethrough than any sidewall openings at said proximal end, upon delivery thereof.

16. The vascular aneurysm treating stent arrangement as recited in claim 15, wherein said distal end of said stent has an expandable web floor disposed thereacross, said floor having an expandable dome-like chamber thereon to permit a first embolytic material to be disposed outwardly thereof, and a second embolytic material to be separately retained within said dome-like chamber.

17. The vascular aneurysm treating stent arrangement as recited in claim 16, wherein said second material comprises metal coils.

18. The vascular aneurysm treating stent arrangement as recited in claim 16, wherein said second material in said chamber comprises a blocking component to said first embolytic material.

19. The vascular aneurysm treating stent arrangement as recited in claim 16, wherein said distal end of said stent has enlarged openings thereacross to permit blood flow across said distal end of said stent, and said distal end of said stent has an expandable, aneurysm-nesting chamber thereon to anchor said stent thereat.

20. The vascular aneurysm treating stent arrangement as recited in claim 19, wherein said distal end of said stent includes a plurality or articulable struts arranged to spread radially outwardly radially adjacent said expandable chamber to further anchor said stent within said aneurysm.