METHOD AND DEVICE FOR FILTERING BODY FLUID

• US 20080065147A1
• Filed: 11/14/2007
• Published: 03/13/2008
• Est. Priority Date: 07/08/1994
• Status: Active Grant

• Current Assignee: Tyco Healthcare Group LP (Medtronic Plc)
• Original Assignee: ev3, Inc. (Medtronic Plc)
• Inventors: Mazzocchi, Rudy, Claude, Timothy, Segermark, James
• Granted Patent: US 7,922,732 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/0057 Implements for plugging an opening in the wall of a hollow or tubular organ, e.g. for sealing a vessel puncture or closing a cardiac septal defect sutures A61B17/04; closing rectum or urethra near body surface A61F2/0009
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12099 characterised by the location of the occluder
• 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: A61B 17/12177 comprising additional materials, e.g. thrombogenic, having filaments, having fibers or being coated
• 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: A61B 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/00575 for closure at remote site, e.g. closing atrial septum defects
• CPC Class Codes: A61B 2017/00592 Elastic or resilient implements
• CPC Class Codes: A61B 2017/00601 Implements entirely comprised between the two sides of the opening
• CPC Class Codes: A61B 2017/0061 Implements located only on one side of the opening
• CPC Class Codes: A61B 2017/00623 Introducing or retrieving devices therefor
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0078 : hyperboloidal
• CPC Class Codes: A61F 2230/008 : paraboloidal
• CPC Class Codes: B21F 45/008 : of medical instruments, e.g. stents, corneal rings medical science A61

Abstract

Medical devices for filtering fluids flowing through a lumen and a method of forming medical devices. The devices can be used in vascular channels, urinary tracts, biliary ducts and the like, and filter emboli and other debris generated at a treatment site.

Claims

1. A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:

a guidewire; and

a filter element carried on the guidewire, the filter element having proximal and distal ends and being expandable from a collapsed configuration when the filter element is restrained to an expanded configuration when the filter element is unrestrained, the filter element having a shape in the expanded configuration which defines a cavity having a proximally facing opening, the guidewire extending to at least the distal end of the filter element.

2. The device of claim 1 wherein the filter element is self-expandable.

3. The device of claim 1 further comprising means for expanding the filter element from the collapsed configuration to the expanded configuration.

4. The device of claim 3 wherein the means for expanding comprises the filter element being comprised of nitinol.

5. The device of claim 1 wherein the filter element is attached to the guidewire at a distal region of the guidewire.

6. The device of claim 1 wherein the distal end of the filter element is connected to a distal band which encircles the guidewire.

7. The device of claim 6 wherein the proximal end of the filter element is connected to a proximal band which encircles the guidewire.

8. The device of claim 7 wherein one of the proximal and distal bands is connected in a fixed position on the guidewire.

9. The device of claim 7 wherein the proximal band is slidably disposed about the guidewire.

10. The device of claim 1 wherein the filter element comprises a metal mesh.

11. The device of claim 1 wherein the filter element is mounted on the guidewire.

12. A device for filtering fluid flowing through a lumen defined by the wall of an anatomical structure comprising:

a guidewire; and

an intravascular device carried on the guidewire, the intravascular device having proximal and distal ends and being expandable from a collapsed configuration when the intravascular device is restrained to an expanded configuration when the intravascular device is unrestrained, the intravascular device having a shape in the expanded configuration which defines a basket having a proximally facing opening defined by a lip which is sized to engage the wall and the anatomical structure when the intravascular device is deployed in the anatomical structure, the guidewire extending to at least the distal end of the intravascular device.

13. The device of claim 12 wherein the intravascular device is self-expandable.

14. The device of claim 12 further comprising means for expanding the intravascular device from the collapsed configuration to the expanded configuration.

15. The device of claim 14 wherein the means for expanding comprises the intravascular device being comprised of nitinol.

16. The device of claim 12 wherein the intravascular device is attached to the guidewire at a distal region of the guidewire.

17. The device of claim 12 wherein the distal end of the intravascular device is connected to a distal band which encircles the guidewire.

18. The device of claim 17 wherein the proximal end of the intravascular device is connected to a proximal band which encircles the guidewire.

19. The device of claim 18 wherein one of the proximal and distal bands is connected in a fixed position on the guidewire.

20. The device of claim 18 wherein the proximal band is slidably disposed about the guidewire.

21. The device of claim 12 wherein the intravascular device is a filter.

22. The device of claim 21 wherein the filter comprises metal.

23. The device of claim 21 wherein the filter comprises a filter mesh.

24. The device of claim 23 wherein the filter mesh comprises a metal.

25. The device of claim 12 wherein the intravascular device is mounted on the guidewire.