Endovascular occlusion devices and methods of use

• US 20050267570A1
• Filed: 05/27/2005
• Published: 12/01/2005
• Est. Priority Date: 05/27/2004
• Status: Abandoned Application

• Current Assignee: John H. Shadduck
• Original Assignee: John H. Shadduck
• Inventors: Shadduck, John H.
• Application Number:
  US11/140,421
• Publication Number:
  US 20050267570A1
• Time in Patent Office: Days
• US Class Current: 623/1.440
• 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 17/12113 within an aneurysm
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61B 2017/00867 shape memory effect
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/91 made from perforated sheet material or tubes, e.g. perforated by laser cuts or etched holes
• CPC Class Codes: A61F 2/915 with bands having a meander structure, adjacent bands being connected to each other
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/075 the stent being loosely attached to the graft material, e.g. by stitching
• 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 2002/30092 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2002/91533 characterised by the phase between adjacent bands
• CPC Class Codes: A61F 2002/91558 connected peak to peak
• CPC Class Codes: A61F 2002/91575 connected peak to trough
• CPC Class Codes: A61F 2210/0014 using shape memory or superelastic materials, e.g. nitinol
• CPC Class Codes: A61F 2210/0076 : multilayered, e.g. laminated structures

Abstract

An implantable stent-like device for treating and occluding arteriovascular malformations (AVMs), fistulas, varicose veins or the like. More particularly, this invention relates to an implant body that includes an open-cell shape-transformable polymer structure that provides stress-free means for occluding an AVM without applying additional pressures an any distended walls of the AVM. In one embodiment, the shape-transformable polymer is a shape memory polymer implant body that self-deploys from a temporary shape to a memory shape. In another embodiment, the shape memory polymer structure is capable of a temporary compacted shape for carrying about the struts of an expandable stent for self-deployment to occlude an aneurysm.

Claims

1. A stent for treating an arteriovascular malformation (AVM) comprising a skeletal support structure for expanding in a blood vessel and a shape-transformable polymer structure coupled to surface portions of the support structure.

2. A stent as in claim 1 wherein the shape-transformable polymer structure has a first shape that is skeletal and a second shape that is non-skeletal.

3. A stent as in claim 2 wherein the second shape is configured to alter blood flow parameters to treat an AVM.

4. A stent as in claim 2 wherein the second shape is configured to extend at least in part outwardly from the skeletal support structure.

5. A stent as in claim 2 wherein the second shape is configured to extend within openings of the skeletal support structure.

6. A stent as in claim 1 wherein the shape-transformable polymer structure includes a shape memory polymer.

7. A stent as in claim 2 wherein the shape-transformable polymer structure is a rofabricated open-cell material.

8. A stent as in claim 2 wherein the shape-transformable polymer structure is a foam.

9. A stent as in claim 1 wherein the shape-transformable polymer structure includes a t shrink polymer.

10. A stent as in claim 1 wherein the shape-transformable polymer structure is at least of knit, woven or braided.

11. A stent as in claim 2 wherein the skeletal support structure is at least one of a metal or a polymer.

13. A stent as in claim 2 wherein the shape memory polymer structure includes at least one of a microfabricated open cell portion and an open-cell foam portion.

12. An implant body for treating vasculature including a shape memory polymer capable of a first temporary compacted shape for endovascular introduction and a second memory expanded shape for altering blood flow parameters in a targeted region of the vasculature.

14. An implant body as in claim 12 wherein the shape memory polymer is coupled to struts of an expandable stent.

15. An implant body as in claim 12 wherein the shape memory polymer has an elongated configuration for occluding a blood vessel.

16. An implant body as in claim 12 wherein the shape memory polymer comprises a constraint for constraining an interior portion of the implant body.

17. An implant body as in claim 12 wherein the shape memory polymer is at least oen of bioerodible and bioabsorbable.

18. A method of treating an arteriovascular malformation (AVM) comprising introducing a stent in a collapsed shape into a blood vessel, expanding the stent in or proximate to an AVM, and altering the shape of a shape-transformable polymer structure coupled to surface portions of the stent to alter blood flow parameters in or proximate to the AVM.

19. A method of treating an arteriovascular malformation (AVM) as in claim 18 wherein the shape-transformable polymer structure extends radially outward from surface portions of the stent.

20. A method of treating an arteriovascular malformation (AVM) as in claim 18 wherein the shape-transformable polymer structure extends laterally within openings between struts of the stent.