Method for treating a body lumen

• US 9,005,274 B2
• Filed: 10/07/2008
• Issued: 04/14/2015
• Est. Priority Date: 08/04/2008
• Status: Active Grant

• Current Assignee: Stentys S.A.S.
• Original Assignee: Stentys S.A.S.
• Inventors: Seguin, Jacques, Issenmann, Gonzague
• Primary Examiner(s): Sweet, Thomas J
• Assistant Examiner(s): SCHALL, MATTHEW WAYNE
• Application Number:
  US12/247,077
• Publication Number:
  US 20100030324A1
• Time in Patent Office: 2,380 Days
• Field of Search: 623/1.15, 623/1.11, 623/1.44, 623/1.46, 623/1.42, 623/1.43, 604/22, 606/194, 424/423
• US Class Current: 623/1.35
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• 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 2002/067 modular
• CPC Class Codes: A61F 2230/0054 V-shaped
• CPC Class Codes: A61F 2250/006 modular

Abstract

A method for treating a body conduit/lumen having an undesired reduced diameter includes determining a target diameter of the conduit/lumen in a target location of the conduit/lumen, and delivering a self-expanding metal stent in a contracted configuration to the target location. In a fully expanded configuration, the stent has a diameter that is more than 50% larger than the target diameter over an entire length of the self-expanding stent.

Claims

1. A method for the treatment of a body lumen, comprising:

determining a target diameter of said lumen in a target location in said lumen, said target diameter closely approximating a natural diameter of the lumen at the target location, the natural diameter being a diameter of the lumen unobstructed by plaque or other occlusions at the target location;

delivering a self-expanding metal stent in a contracted configuration to said target location, wherein said self-expanding metal stent, in a fully self-expanded configuration, has a diameter that is more than 55% larger than said target diameter over an entire length of said self-expanding metal stent; and

allowing the self-expanding metal stent to self-expand at said target location.

2. The method of claim 1, wherein said self-expanding stent is configured to exert a substantially constant radially outward force over substantially a full range of expansion of said stent.

3. The method of claim 1, comprising determining said target diameter based on a diameter of said body lumen at a location upstream of said target location.

4. The method of claim 1, wherein said lumen is part of a branching system of lumens, comprising determining said target diameter based on a diameter of at least one parallel branch of said branching system of lumens.

5. The method of claim 4, wherein said branching system is a coronary tree.

6. The method of claim 1, comprising treating an obstruction of said lumen at said target location before delivering said self-expanding stent to said target location.

7. The method of claim 6, wherein treating said obstruction comprises supplying a thrombolytic agent to said target location prior to delivering said self-expanding stent to said target location.

8. The method of claim 6, wherein treating said obstruction comprises supplying an anti-spastic agent to said target location prior to delivering said self-expanding stent to said target location.

9. The method of claim 6, wherein treating said obstruction comprises mechanical treatment of said obstruction.

10. The method of claim 9, wherein said mechanical treatment comprises deoccluding said obstruction with a percutaneous de-occluding tool.

11. The method of claim 9, wherein said mechanical treatment comprises debulking said obstruction with a percutaneous de-bulking tool.

12. The method of claim 9, wherein said mechanical treatment comprises performing balloon angioplasty at said obstruction.

13. The method of claim 6, wherein treating said obstruction comprises aspiration of a thrombus.

14. The method of claim 6, wherein treating said obstruction comprises laser treatment of said obstruction.

15. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is more than 60% larger than said target diameter over an entire length of said self-expanding stent.

16. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is more than 65% larger than said target diameter over an entire length of said self-expanding stent.

17. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is more than 70% larger than said target diameter over an entire length of said self-expanding stent.

18. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is more than 75% larger than said target diameter over an entire length of said self-expanding stent.

19. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is more than 80% larger than said target diameter over an entire length of said self-expanding stent.

20. The method of claim 1, wherein said self-expanding stent, in a fully self-expanded configuration, has a diameter that is up to 150% larger than said target diameter over an entire length of said self-expanding stent.

21. The method of claim 1, wherein said body lumen is a blood vessel.

22. The method of claim 21, wherein said target location is a site of an undesired reduced diameter of said blood vessel.

23. The method of claim 21, wherein said target location is a site of a contractile spasm of said blood vessel.

24. The method of claim 21, wherein said target location is a site of a thrombus located in said blood vessel.

25. The method of claim 21, wherein said target location is a site of trauma to said blood vessel.

26. The method of claim 1, wherein said target diameter is substantially constant along a length of said target location.

27. The method of claim 1, wherein said target location includes at least one side branch of said lumen.

28. The method of claim 27, comprising creating an access site through a wall of said self-expanding stent to said at least one side branch during the same procedure in which said self-expanding stent is delivered to said target location.

29. The method of claim 27, comprising creating an access site through a wall of said self-expanding stent to said at least one side branch at least 24 hours after delivering said self-expanding stent to said target location.