Bifurcation aneurysm treatment stent with distal web

• US 20070203567A1
• Filed: 12/23/2006
• Published: 08/30/2007
• Est. Priority Date: 12/23/2005
• Status: Abandoned Application

• Current Assignee: Elad Levy
• Original Assignee: Elad Levy
• Inventors: Levy, Elad
• Application Number:
  US11/645,248
• Publication Number:
  US 20070203567A1
• Time in Patent Office: Days
• US Class Current: 623/1.150
• 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 stent device for introduction into a bifurcation aneurysm, comprising a radially expandable elongated wire mesh tube having a proximal end and a distal end. The distal end is expandable into a cone shaped portion of a larger diameter than the proximal end. A web of material is arranged across said distal end of said stent device for sealing an aneurysm at a neck portion thereof.

Claims

1. A stent device for introduction into and for treatment of a bifurcation aneurysm, comprising:

a radially expandable elongated wire mesh tube having a proximal end and a distal end, said distal end being expandable into a cone shaped portion of a larger diameter than said proximal end; and

a web of material arranged across said distal end of said stent device for sealing an aneurysm at a neck portion thereof.

2. The stent device as recited in claim 1, wherein said web is foraminous.

3. The stent device as recited in claim 1, wherein said web in non-foraminous.

4. The stent device as recited in claim 1, including an arrangement of struts at said distal end of said tube.

5. The stent device as recited in claim 4, wherein said struts have an aneurysm neck-portion-engaging distal end.

6. The stent device as recited in claim 1. wherein said web has openings therethrough which are smaller than wall openings in said proximal end of said tube.

7. The stent device as recited in claim 1, wherein said web is comprised of a foldable film of polymer.

8. The stent device as recited in claim 1, wherein said web is radiopaque.

9. The stent device as recited in claim 1, wherein said web is nestable across a neck portion of an aneurysm to seal embolytic material therein.

10. The stent device as recited in claim 1, wherein said web is pierceable by a microcatheter.

11. A method of treating a bifurcation aneurysm comprising:

introducing a microwire into said aneurysm;

introducing a waffle-cone-shapable microcatheter into said aneurysm over said microwire;

expanding a distal end of said microcatheter into a tapered waffle-cone shape within said bifurcation aneurysm; and

pivoting outwardly an annular array of anchoring struts from a circumferential array thereof spaced proximately adjacent said distal end of said catheter so as to anchor said distal end of said microcatheter within said aneurysm.

12. The method of claim 11, including:

arranging a pierceable web across said distal end of said microcatheter.

13. The method of claim 11, including:

introducing an embolitic agent through said catheter and said web on said distal end of said catheter, distally beyond said anchoring struts and into said aneurysm.

14. The method of claim 12, wherein said pierceable web is foraminous.

15. The method of claim 12, wherein said pierceable web is a non-foraminous film, to provide a sealed distal end to permit an unencumbered aneurysm-entering distal motion of said catheter.

16. The method of claim 11, wherein said struts have an outer end of “

ski-tip”

shape, to facilitate anchoring said catheter within a neck portion of the aneurysm.

17. The method of claim 16, including:

forming said ski-tip end of said struts to extend separate and apart from said distalmost end of said microcatheter.

18. A stent device for introduction into and for treatment of a bifurcation aneurysm, comprising:

a radially expandable elongated wire mesh tube having a proximal end and a distal end, said distal end being expandable into a cone-shapeable portion of a larger diameter than said proximal end, said stent having foraminous wall portions with openings therein of a first opening size;

a pierceable web of material arranged across said distal end of said stent device for sealing an aneurysm at a neck portion thereof, said web having foraminous portions with openings therein of a second opening size, said second opening size being smaller than said openings of said first opening size, said web sealing said aneurysm.

19. The stent device as recited in claim 18, having a circumferential array of radially outwardly splayable anchoring struts, said circumferential array of struts disposed proximately adjacent a zig-zag distalmost wire wall portion of said cone-shapeable portion of said stent device.

20. The stent device as recited in claim 19, wherein said anchoring struts have a distalmost tip portion which is free of attachment to said zig-zag distalmost wire wall portion of said stent device and said web is foraminous.