FILTER DEVICE FOR EMBOLIC PROTECTION SYSTEMS

• US 20070276429A1
• Filed: 06/26/2007
• Published: 11/29/2007
• Est. Priority Date: 06/29/2001
• Status: Active Grant

• Current Assignee: Advanced Cardiovascular Systems Incorporated
• Original Assignee: Advanced Cardiovascular Systems Incorporated
• Inventors: Huter, Benjamin, Whitfield, John, Papp, John, Patel, Anuja
• Granted Patent: US 7,959,646 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 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 2002/015 Stop means therefor
• 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 2230/0065 toroidal, e.g. ring-shaped, doughnut-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal

Abstract

A system for enabling the insertion and removal of an embolic protection device, for capturing and retaining embolic debris which may be created during the performance of a therapeutic interventional procedure in a stenosed or occluded region of a blood vessel. The system, in an embodiment thereof, enables the device to be snap-fitted so as to engage the distal end of a guide wire, to provide a reference for positioning the device at a location distal to the interventional procedure site, and to enable an end of the device to be in tension, enabling a portion of the device to be in tension and another portion to be in compression, so as to assist in bending thereof in tortuous vasculature.

Claims

1-17. -17. (canceled)

18. A system for enabling the capture of embolic material which may be released into a body vessel during a therapeutic interventional procedure, comprising:

a guide wire; and

a filter device associated with the guide wire, the filter device adapted to capture embolic material which may be released into the fluid in the body vessel during the interventional procedure and including an engaging element for enabling the filter device to be snap fitted so as to engage the guide wire;

wherein the guide wire further includes engageable elements attached thereto to enable the engaging element of the filter device to be snap fitted thereto, the engagable elements being made from a radiopaque material for providing a reference for positioning the filter device in the patient'"'"'s body vessel.

19. The system of claim 18, wherein the filter device, upon being snap-fitted to the guide wire, is adapted to enable rotational movement of the filter device independent of rotational movement of the guide wire.

20. The system of claim 18, wherein the filter device, upon being snap-fitted to the guide wire, is adapted to inhibit translational movement of the filter device relative to the guide wire.

21. The system of claim 19, wherein the filter device, upon being snap-fitted to the guide wire, is adapted to inhibit translational movement of the filter device relative to the guide wire.

22. The system of claim 18, wherein the engageable elements include a proximal stop and a distal stop, each adapted to be secured to the guide wire, and having a space between the proximal stop and the distal stop, and adapted to enable a portion of the engaging element of the filter device to be snap fitted in the space between the proximal stop and the distal stop.

23. The system of claim 18, wherein the filter device includes a cage, adapted to be engaged with the guide wire, and filter material, for filtering embolic material, secured to the cage.

24. The system of claim 18, wherein the guide wire includes a tip coil, at the distal end of the guide wire, the tip coil includes a proximal portion, and the system further comprises an obturator attached to the filter device and including a distal portion, the distal portion of the obturator being adapted to extend over the proximal portion of the tip coil.

25. The system of claim 18, wherein the filter device is formed from a hypotube of expandable material.

26. The system of claim 18, wherein the engaging element of the filter device includes comprises at least one tab adapted to be snap fitted in the space between the proximal stop and the distal stop.

27. The system of claim 25, further including a spring connected to an end of the hypotube, to enable a portion of the filter device to be in tension so as to aid in the tracking and deploying of the filter device in tortuous vasculature.

28. The system of claim 27, wherein the hypotube includes at least one tab, formed at the end thereof at which the spring is adapted to be connected and which is adapted to be in tension.

29. A system for enabling the capture of embolic material which may be released into a blood vessel during a therapeutic interventional procedure, comprising:

a guide wire including a proximal stop and a distal stop and a space between the proximal stop and the distal stop; and

a filter device movable over the guide wire and including an engaging element for enabling the filter device to be snap-fitted within the space between the proximal stop and distal stop.

30. The system of claim 29, wherein the filter device is adapted to enable rotational movement of the filter device independent of rotational movement of the guide wire.

31. The system of claim 29, wherein the filter device, upon being snap-fitted to the distal end of the guide wire, is adapted to inhibit translational movement of the filter device relative to the guide wire.

32. The system of claim 30, wherein the filter device, upon being snap-fitted to the distal end of the guide wire, is adapted to inhibit translational movement of the filter device relative to the guide wire.

33. The system of claim 29, wherein the proximal stop and a distal stop are made from radiopaque material for providing a reference for positioning the filter device in the patient'"'"'s vasculature.

34. The system of claim 29, wherein the filter device is adapted to be formed from a hypotube of expandable material.

35. The system of claim 29, wherein the engaging element of the filter device comprises at least one tab adapted to be snap fitted in the space formed between the proximal stop and the distal stop.

36. The system of claim 29, wherein the filter device includes a plurality of ends and a spring connected to one of the ends of the filter device to enable a portion of the filter device to be in tension, so as to aid in the tracking and deploying of the cage in tortuous vasculature.

37. The system of claim 36, wherein the engaging element includes at least one tab, formed at the end thereof at which the spring is adapted to be connected and which is adapted to be in tension.

33-1. The system of claim 29, wherein the filter device includes a cage, adapted to be engaged with the guide wire, and filter material, for filtering embolic material, secured to the cage.