Intraluminal catheter with hydraulically collapsible self-expanding protection device

• US 20040098022A1
• Filed: 11/14/2002
• Published: 05/20/2004
• Est. Priority Date: 11/14/2002
• Status: Abandoned Application

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Barone, David D.
• Application Number:
  US10/295,153
• Publication Number:
  US 20040098022A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/12109 in a blood vessel
• CPC Class Codes: A61B 17/12136 Balloons
• CPC Class Codes: A61B 17/12172 having a pre-set deployed three-dimensional shape methods of manufacturing A61B2017/00526
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61M 2025/0175 having telescopic features, interengaging nestable members movable in relations to one another
• CPC Class Codes: A61M 25/0068 Static characteristics of the catheter tip, e.g. shape, atraumatic tip, curved tip or tip structure
• CPC Class Codes: A61M 25/0069 Tip not integral with tube
• CPC Class Codes: A61M 25/0074 Dynamic characteristics of the catheter tip, e.g. openable, closable, expandable or deformable
• CPC Class Codes: A61M 25/008 Strength or flexibility characteristics of the catheter tip
• CPC Class Codes: A61M 25/0082 Catheter tip comprising a tool

Abstract

An intraluminal protection system for capturing emboli in the blood stream comprises a tubular member having a lumen therethrough and an actuating member slideably mounted at the distal end of the tubular member and configured for longitudinal, telescopic movement with respect to the tubular member. A collapsible, self-expanding protection element (e.g. a filter, occluder, etc.) has a proximal end coupled to the tubular member and a distal end coupled to the actuating member such that when a fluid pressure is applied to the actuating member, the protection element collapses.

Claims

1. An intraluminal protection system for capturing emboli, comprising:

a first tubular member having a lumen therethrough and having a proximal end and a distal end;

an actuating member slidably mounted at said distal end and configured for longitudinal movement with respect to said first tubular member; and

a collapsible, self-expanding protection element having a proximal end coupled to

said first tubular member and a distal end coupled to said actuating member.

2. A system according to claim 1 wherein said actuating member is a plunger configured for telescopic movement within said first tubular member, said plunger extending beyond a distal end of said tubular member.

3. A system according to claim 1 wherein said actuating member is a second tubular member configured for telescopic movement with respect to said first tubular member, said second tubular extending over a distal end of said first tubular member.

4. A system according to claim 2 further comprising a sealing member fixedly attached to said plunger for providing a fluid seal between said first tubular member and said plunger.

5. A system according to claim 3 further comprising a sealing member fixedly attached to said second tubular member for providing a fluid seal between said first tubular member and second tubular member.

6. A system according to claim 2 wherein said first tubular member is made of nitinol.

7. A system according to claim 3 wherein said second tubular member is made of nitinol.

8. A system according to claim 1 further comprising a fluid inflation assembly coupled to said first tubular member for applying a fluid pressure to said actuating member to collapse said protection element.

9. A system according to claim 1 wherein said protection element is a filter.

10. A system according to claim 1 wherein said protection element is an occluder.

11. A system according to claim 9 wherein said filter comprises a proximal region having a plurality of openings therein of sufficient size for emboli to pass through.

12. A system according to claim 11 wherein said filter comprises a distal region having a plurality of pores therein of a size sufficiently small to capture the emboli.

13. A system according to claim 12 wherein at least said distal region is a mesh.

14. A system according to claim 13 wherein said filter is made of nitinol.

15. An intraluminal protection system for capturing emboli in blood flowing in a blood vessel comprising:

a first tubular member for insertion into said blood vessel;

an actuator slidably coupled to said first tubular member at a distal portion of said first tubular member; and

a collapsible, self-expanding protection element coupled to said first tubular member and to said actuator, said protection element having a normally open position and said protection element collapsing upon the application of a fluid pressure to said actuator.

16. A system according to claim 15 wherein said actuator is a plunger configured for telescopic movement within said first tubular member and extending beyond a distal end of said first tubular member.

17. A system according to claim 15 wherein said actuator is a second tubular member configured for telescopic movement within respect to said first tubular member and extending over a distal end of said first tubular member.

18. A system according to claim 16 further comprising a sealing member fixedly attached to said plunger for providing a fluid seal between said first tubular member and said plunger.

19. A system according to claim 17 further comprising a sealing member fixedly attached to said second tubular member for providing a fluid seal between said first tubular member and said second tubular member.

20. A system according to claim 15 further comprising a fluid inflation assembly coupled to said first tubular member for applying a fluid pressure to said actuating member to collapse said protection element.

21. A system according to claim 15 wherein said protection element is a filter.

22. A system according to claim 15 wherein said protection element is an occluder.

23. A system according to claim 21 wherein said filter comprises a proximal region having a plurality of openings therein of sufficient size for emboli to pass through.

24. A system according to claim 23 wherein said filter comprises a distal region having a plurality of pores therein, said pores being sufficiently small to capture said emboli.

25. A system according to claim 24 wherein said filter is made of nitinol.

26. A pressure controlled protection system comprising:

a first tubular member having a lumen therethrough; and

a collapsible, self-expanding, protection assembly that is collapsed upon the application of a fluid pressure thereto.

27. A system according to claim 26 wherein said protection assembly comprises:

an actuator slidably coupled to said first tubular member at a distal portion of said first tubular member; and

wherein the protection assembly is coupled to said first tubular member and to said actuator, said protection assembly having a normally open position and said protection assembly collapsing upon the application of a fluid pressure to said actuator.

28. A system according to claim 27 wherein said actuator is a plunger configured for telescopic movement within said first tubular member and extending beyond a distal end of end of said first tubular member.

29. A system according to claim 27 wherein said actuator is a second tubular member configured for telescopic movement within said first tubular member and extending over a distal end of end of said first tubular member.

30. A system according to claim 28 further comprising a sealing member fixedly attached to said plunger for providing a fluid seal between said first tubular member and said plunger.

31. A system according to claim 29 further comprising a sealing member fixedly attached to said second tubular member for providing a fluid seal between said first tubular member and said second tubular member.

32. A system according to claim 27 further comprising a fluid inflation assembly coupled to said first tubular member for applying a fluid pressure to said actuating member to collapse said protection element.

33. A system according to claim 27 wherein said protection element is a filter.

34. A system according to claim 27 wherein said protection element is an occluder.

35. A system according to claim 33 wherein said filter comprises a proximal region having a plurality of openings therein of sufficient size for emboli to pass through.

36. A system according to claim 35 wherein said filter comprises a distal region having a plurality of pores therein sufficiently small to capture said emboli.

37. A system according to claim 36 wherein said filter is made of nitinol.

38. A method for removing emboli in the blood stream of a blood vessel, comprising:

applying a fluid pressure to a self-expanding, collapsible filter to collapse the filter;

inserting the filter into the blood vessel;

removing the fluid pressure to allow the filter to expand and capture the emboli;

reapplying the fluid pressure to collapse the filter; and

removing the filter and captured emboli from the blood vessel.

39. A method according to claim 38 wherein fluid pressure is applied to an actuator coupled to the filter for collapsing the filter.

40. A method for removing emboli in the blood stream of a blood vessel, comprising:

applying a fluid pressure to a self-expanding, collapsible occluder to collapse the occluder;

inserting the occluder into the blood vessel;

removing the fluid pressure to allow the occluder to expand and capture the emboli;

aspirating the blood vessel to remove the emboli;

reapplying the fluid pressure to collapse the occluder; and

removing the occluder from the blood vessel.