EMBOLIC PROTECTION SYSTEM

• US 20070123931A1
• Filed: 01/31/2007
• Published: 05/31/2007
• Est. Priority Date: 11/07/1997
• Status: Active Grant

• Current Assignee: Salviac Ltd. (Abbott Laboratories)
• Original Assignee: Salviac Ltd. (Abbott Laboratories)
• Inventors: Brady, Eamon, Vale, David, Taylor, Charles, Gilson, Paul, Gilvarry, Michael, Griffin, Patrick
• Granted Patent: US 7,846,176 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61F 2/0095 Packages or dispensers for prostheses or other implants for intraocular lenses A61F2/1691; for dental surgery A61C19/02
• 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 2/9522 Means for mounting a stent or stent-graft onto or into a placement instrument
• 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 2230/0067 conical

Abstract

An assembly for loading a collapsible embolic protection filter 1 into a catheter 2, comprises a catheter 2 defining a reception space at a distal end of the catheter 2 for receiving a collapsed embolic protection filter 1; and a separate removable pushing device 8 for delivering the embolic protection filter 1 into the reception space. The pushing device 8 comprises an elongate stem 71 with a proximal stop 72 for engagement with the filter 1. A separate loading device 7 to collapse the embolic protection filter 1 is also provided. The loading device 7 defines an inlet end and an outlet end, the outlet end being configured for co-operative alignment with the reception space.

Claims

1. A method of providing embolic protection, comprising:

delivering a filter carrier through a vascular system of a patient;

delivering a filter element on the filter carrier to a location within a blood vessel that is distal to a treatment location, the filter element being delivered in a collapsed stored position for movement through the vascular system;

expanding the filter element to an expanded position in which the filter element at least partially contacts a wall of the blood vessel such that blood passing through the blood vessel is delivered through the filter element but embolic material in the blood is retained in the filter element;

performing an interventional procedure at the treatment location;

advancing a retrieval catheter over the filter element;

at least partially collapsing the filter element; and

withdrawing the retrieval catheter and filter element from the blood vessel.

2. The method of providing embolic protection of claim 1, wherein the filter carrier is a guidewire.

3. The method of providing embolic protection of claim 2, further comprising delivering a dye over the guidewire.

4. The method of providing embolic protection of claim 3, wherein the dye is delivered over the guidewire after the retrieval catheter and the filter element have been withdrawn.

5. The method of providing embolic protection of claim 2, further comprising delivering lytic agents within the blood vessel.

6. The method of providing embolic protection of claim 5, wherein the lytic agents are delivered after the retrieval catheter and the filter element have been withdrawn.

7. The method of providing embolic protection of claim 5, wherein the lytic agents are delivered while the filter element is deployed at the location distal to a treatment location.

8. The method of providing embolic protection of claim 2, wherein the interventional procedure is an angioplasty procedure.

9. The method of providing embolic protection of claim 2, wherein the interventional procedure is an arthrectomy procedure.

10. The method of providing embolic protection of claim 2, wherein the interventional procedure is a stenting procedure.

11. The method of providing embolic protection of claim 3, wherein the interventional procedure is an angioplasty procedure.

12. The method of providing embolic protection of claim 3, wherein the interventional procedure is an arthrectomy procedure.

13. The method of providing embolic protection of claim 3, wherein the interventional procedure is a stenting procedure.

14. The method of providing embolic protection of claim 5, wherein the interventional procedure is an angioplasty procedure.

15. The method of providing embolic protection of claim 5, wherein the interventional procedure is an arthrectomy procedure.

16. The method of providing embolic protection of claim 5, wherein the interventional procedure is a stenting procedure.

17. The method of providing embolic protection of claim 2, further comprising:

withdrawing the guidewire from the blood vessel after the filter element has been at least partially collapsed, and introducing a replacement guidewire through the retrieval catheter.

18. The method of providing embolic protection of claim 2, further comprising:

withdrawing the guidewire and filter element from the blood vessel after the filter element has been at least partially collapsed; and

introducing a replacement guidewire through the retrieval catheter.

19. The method of providing embolic protection of claim 18, further comprising withdrawing the retrieval catheter to a position proximal to the treatment location.

20. The method of providing embolic protection of claim 19, wherein the retrieval catheter and filter element are withdrawn to the position proximal to the treatment location before the guidewire and the filter element are withdrawn.