GUIDE WIRE WITH EMBOLIC FILTERING ATTACHMENT

• US 20090131971A1
• Filed: 02/04/2008
• Published: 05/21/2009
• Est. Priority Date: 09/30/2002
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Papp, John E., Cornish, Wayne E., Huter, Scott J., Huter, Benjamin C., Gesswein, Douglas H.
• Granted Patent: US 7,815,660 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• 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 2230/008 paraboloidal

Abstract

A separate deliverable embolic protection device filter that attaches to a helical coil at a distal end of a conventional guide, for use in a blood vessel when an interventional procedure is being performed to capture any embolic material which may be created and released into the bloodstream during the procedure. The device includes a filter assembly with a proximal end and a distal end, and a guide wire connector attached to the distal end of the filter assembly. The guide wire connector is able to couple with the helical coil of the guide wire. A restraining sheath placed over the filter assembly in a coaxial arrangement maintains the filter assembly in a collapsed position and delivers the filter assembly separately to the helical coil of the guide wire, and then the guide wire connector is joined to the helical coil. Alternatively, the guide wire can include a rotatable coil section forming a portion of the distal tip coil on the guide wire which is adapted to be coupled to the filter assembly. This arrangement allows the filter assembly to be rotatably mounted onto the guide wire.

Claims

1-17. -17. (canceled)

18. A method of capturing embolic debris released into a blood vessel of a patient, comprising:

inserting a guide wire having a helical coil at a distal end into the blood vessel and directing the distal end of the guide wire to a treatment area;

slidably mounting a filter assembly having a guide wire connector disposed at one end onto the guide wire, and directing the filter assembly along the guide wire; and

coupling the guide wire connector to the helical coil of the guide wire.

19. The method of claim 18, wherein coupling the guide wire connector to the helical coil, the guide wire connector being a connecting coil.

20. The method of claim 19, further comprising rotating the filter assembly and connection coil around the guide wire for screwing the connection coil onto the helical coil.

21. The method of claim 19, further comprising rotating the guide wire for screwing the connecting coil around the helical coil.

22. The method of claim 18, wherein coupling the guide wire connector to the helical coil, the guide wire connector includes a spring-loaded tab.

23. The method of claim 22, further comprising forcing the filter assembly and spring-loaded tab together with the helical coil of the guide wire, grasping the spring-loaded tab around the helical coil.

24. The method of claim 22, further comprising forcing the filter assembly and spring-loaded tab together with the helical coil of the guide wire, catching the spring-loaded tab inside the helical coil.

25. The method of claim 18, further comprising placing a sheath over the filter assembly to maintain the filter assembly in a collapsed position, and then directing the sheath including the filter assembly over the guide wire until the connector abuts the helical coil of the guide wire.

26. The method of claim 25, further comprising rotating the sheath to join the connector to the helical coil.

27. The method of claim 25, further comprising retracting the sheath to expose the filter assembly after the connector is coupled to the helical coil of the guide wire, allowing the filter assembly to form an expanded position.

28. The method of claim 27, further comprising fitting the sheath over the filter assembly and removing the guide wire and sheath from the vessel.

40. The method of claim 18, wherein the guide wire connector is disposed at a distal end of the filter assembly.

41. The method of claim 18, wherein the guide wire connector is disposed at a proximal end of the filter assembly.

29. An apparatus for embolic protection, comprising:

a guide wire having a tip coil disposed on a distal end and a rotating coil section rotatable mounted on the guide wire which forms a portion of the tip coil; and

a filter assembly disposed for traveling along the guide wire, the filter assembly including a first end and a second end, and a guide wire connector disposed on one of the ends of the filter assembly;

wherein the guide wire connector is adapted for coupling to the rotating portion of the tip coil.

30. The apparatus of claim 29, wherein the guide wire connector includes a connection coil.

31. The apparatus of claim 29, wherein the guide wire connector includes a spring-loaded tab.

32. The apparatus of claim 29, wherein the filter assembly includes a plurality of self-expanding struts disposed between the first and second ends.

33. The apparatus of claim 29, wherein the rotating coil section of the coil tip is disposed between a proximal coil section and a distal coil section which are fixed to the guide wire.

34. The apparatus of claim 33, wherein the rotating coil section of the coil tip has an outer diameter which is greater than the outer diameter of the proximal coil section.

35. An apparatus for embolic protection, comprising:

a guide wire having a tip coil disposed on a distal end and a rotating coil section rotatable mounted on the guide wire which forms a portion of the tip coil; and

a filter assembly including a proximal end and a distal end;

wherein one end of the filter assembly is coupled to the rotating coil section of the tip coil.

36. The apparatus of claim 35, wherein the rotating coil section of the coil tip is disposed between a proximal coil section and a distal coil section which are fixed to the guide wire.

42. The apparatus of claim 35, wherein the distal end of the filter assembly is coupled to the rotating coil section of the tip coil.