ENDOVASCULAR DEVICES/CATHETER PLATFORMS AND METHODS FOR ACHIEVING CONGRUENCY IN SEQUENTIALLY DEPLOYED DEVICES

• US 20100318173A1
• Filed: 06/21/2010
• Published: 12/16/2010
• Est. Priority Date: 12/21/2007
• Status: Abandoned Application

• Current Assignee: Massachusetts Institute of Technology
• Original Assignee: Massachusetts Institute of Technology
• Inventors: Gibson, William J., Swaminathan, Rajesh V., Kolandaivelu, Kumaran, Edelman, Elazer R.
• Application Number:
  US12/819,478
• Publication Number:
  US 20100318173A1
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/826 more than one stent being applied sequentially
• CPC Class Codes: A61F 2210/009 magnetic
• CPC Class Codes: A61F 2250/0063 Nested prosthetic parts
• CPC Class Codes: A61M 2025/1013 with concentrically mounted balloons, e.g. being independently inflatable
• CPC Class Codes: A61M 25/1011 Multiple balloon catheters

Abstract

A stent alignment system includes an implantable stent and catheter that allows the ability to precisely control translational and rotational position in a vessel of the implantable stent and catheter.

Claims

1. A stent alignment system comprising:

an implantable stent and catheter that allows the ability to precisely control translational and rotational position in a vessel of said implantable stent and catheter.

2. The stent alignment system of claim 1 further comprising

one or more platform stents being implanted into a vessel wall;

and

one or more mating stents, that are subsequently deployed and placed such that there is a longitudinal overlap between the one or more platform stents and one or more mating stents, said longitudinal overlap occurs so as to control the overlay pattern of said one or more mating stents onto said one or more platform stents.

3. The stent alignment system of claim 2, wherein said one or more mating stents pre-expanded to a diameter sufficiently smaller than the target vessel diameter to allow rotational and translational motion of the implantable stent with respect to an internal reference frame.

4. The stent alignment system of claim 3, wherein said one or more mating stents are pre-expanded using a balloon structure.

5. The stent alignment system of claim 4, wherein said balloon structure comprises concentric balloons.

6. The stent alignment system of claim 2, wherein said one or more mating stents comprise inter-strut projections fitting into the inter-strut spacing of the one or more platform stents that facilitate alignment with the one or more platform stent.

7. The stent alignment system of claim 6, wherein said inter-strut projections are formed from a distensible balloon, when inflated, expands into inter-strut spacing of the one or more mating stents.

8. The stent alignment system of claim 2, wherein said one or more mating stents are stabilized with respect to the vessel wall and the one or more platform stents to enable desired alignment using an upstream expansion balloon or downstream expansion balloon.

9. The stent alignment system of claim 2, wherein said one or more mating stents receive a signal used to determine its respective alignment.

10. The stent alignment system of claim 2, wherein said one or more platform stents emit or distort a signal used to determine its respective alignment.

11. The stent alignment system of claim 2, wherein said one or more platform stent is positioned over a guide-wire used to detect translational and rotational positioning of an expansion catheter.

12. The stent alignment system of claim 2, wherein said the one or more platform stents emit fields that interact with fields generated from the one or more mating stents or inter-strut regions of the one or more mating stents to provide a re-directing force.

13. The stent alignment system of claim 5, wherein the inter-strut regions of the one or more mating stents are polarized by inflation with a polarizable material in conjunction with a catheter tip that is polarized or polarizable.

14. A method of forming a stent alignment system comprising:

positioning an implantable stent and catheter in a vessel wall; and

precisely controlling the translational and rotational position of said implantable stent and catheter in said vessel.

15. The method of claim 14 further comprising

one or more platform stents being implanted into a vessel wall;

and

one or more mating stents, that are subsequently deployed and placed such that there is a longitudinal overlap between the one or more platform stents and one or more mating stents, said longitudinal overlap occurs so as to control the overlay pattern of said one or more mating stents onto said one or more platform stents.

16. The method of claim 15, wherein said one or more mating stents pre-expanded to a diameter sufficiently smaller than the target vessel diameter to allow rotational and translational motion of the implantable stent with respect to an internal reference frame.

17. The method of claim 16, wherein said one or more mating stents are pre-expanded using a balloon structure.

18. The method of claim 17, wherein said balloon structure comprises concentric balloons.

19. The method of claim 15, wherein said one or more mating stents comprise inter-strut projections fitting into the inter-strut spacing of the one or more platform stents that facilitate alignment with the one or more platform stent.

20. The method of claim 19, wherein said inter-strut projections are formed from a distensible balloon, when inflated, expands into inter-strut spacing of the one or more mating stents.

21. The method of claim 15, wherein said one or more mating stents are stabilized with respect to the vessel wall and the one or more platform stents to enable desired alignment using an upstream expansion balloon or downstream expansion balloon.

22. The method of claim 15, wherein said one or more mating stents receive a signal used to determine its respective alignment.

23. The method of claim 15, wherein said one or more platform stents emit or distort a signal used to determine its respective alignment.

24. The method of claim 15, wherein said one or more platform stent is positioned over a guide-wire used to detect translational and rotational positioning of an expansion catheter.

25. The method of claim 15, wherein said the one or more platform stents emit fields that interact with fields generated from the one or more mating stents or inter-strut regions of the one or more mating stents to provide a re-directing force.

26. The method of claim 18, wherein the inter-strut regions of the one or more mating stents are polarized by inflation with a polarizable material in conjunction with a catheter tip that is polarized or polarizable.