TEMPORARY VENOUS FILTER WITH ANTI-COAGULANT DELIVERY METHOD

• US 20120184984A1
• Filed: 01/13/2011
• Published: 07/19/2012
• Est. Priority Date: 01/13/2011
• Status: Active Grant

• Current Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Original Assignee: Cook Medical Technologies, LLC (Cook Group Incorporated)
• Inventors: Koehler, Cleve
• Granted Patent: US 10,022,212 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/0103 With centering means
• CPC Class Codes: A61F 2/0105 Open ended, i.e. legs gathered only at one side
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body

Abstract

The present invention provides a removable vena cava filter for capturing and treating blood clots in a blood vessel. The filter comprises a hub, a plurality of struts extending distally from the hub, and a tubular member disposed through the hub. The tubular member has a proximal end and a distal portion including a plurality of perforations. A catheter may be attached to the proximal end of the tubular member. Fluid may be injected into the catheter to treat blood clots captured in the filter.

Claims

1. A filter for capturing and treating blood clots in a blood vessel, the filter comprising:

a hub having a distal end and a proximal end;

a plurality of struts extending distally from the hub; and

a tubular member disposed through the hub, the tubular member having a distal end and a proximal end, the tubular member having a distal portion extending from the distal end of the hub to the distal end of the tubular member and a proximal portion extending from the proximal end of the hub to the proximal end of the tubular member, the distal portion of the tubular member having a plurality of perforations.

2. The filter of claim 1, wherein the tubular member is fixedly attached to the hub.

3. The filter of claim 1, wherein each strut has a first end attached to the hub and a second end, and wherein the distal end of the tubular member is disposed distally to the second ends of the plurality of struts.

4. The filter of claim 1, wherein the tubular member is constructed from a rigid material.

5. The filter of claim 1, wherein the tubular member is constructed from a flexible material.

6. The filter of claim 1, wherein the distal end of the tubular member is closed.

7. The filter of claim 1, wherein the perforations are selectively placed on the distal portion of the tubular member.

8. The filter of claim 1, wherein the perforations have a plurality of sizes or shapes.

9. The filter of claim 1, wherein the plurality of struts comprise:

a plurality of primary struts having first ends attached to the hub along a longitudinal axis, each primary strut extending arcuately along the longitudinal axis and linearly radially, each primary strut including an arcuate segment having a first absolute tensile strength, the arcuate segment including a first curved portion and a second curved portion, the first curved portion extending from the first end away from the longitudinal axis, the second curved portion extending from the first curved portion toward the longitudinal axis and terminating at an anchoring hook, the anchoring hook being integral with the arcuate segment and having the same thickness as the arcuate segment; and

a plurality of secondary struts freely spaced between the primary struts and having connected ends attached to the hub along the longitudinal axis, each secondary strut freely extending from the connected end to a free end avoiding contact with other secondary struts and primary struts, each secondary strut extending arcuately along the longitudinal axis and linearly radially, each secondary strut including a first arc and a second arc, the first arc extending from the connected end away from the longitudinal axis, the second arc extending from the first arc toward the longitudinal axis and terminating at the free end without a hook, each secondary strut having a second absolute tensile strength.

10. A filter assembly for capturing and treating blood clots in a blood vessel, the assembly comprising:

a filter comprising;

a hub having a distal end and a proximal end;

a plurality of struts extending distally from the hub; and

a tubular member disposed through the hub, the tubular member having a distal end and a proximal end, the tubular member having a distal portion extending from the distal end of the hub to the distal end of the tubular member and a proximal portion extending from the proximal end of the hub to the proximal end of the tubular member, the distal portion of the tubular member having a plurality of perforations; and

a catheter in fluid communication with the tubular member, the catheter having a distal end and a proximal end, the distal end of the catheter adjoining the proximal end of the tubular member.

11. The filter assembly of claim 10, wherein the distal end of the catheter is fixedly attached to the proximal end of the tubular member.

12. The filter assembly of claim 10, wherein the catheter is formed integrally with the tubular member.

13. The filter assembly of claim 10, wherein the catheter is constructed from a flexible material.

14. The filter assembly of claim 10, further comprising a fluid manifold attached to the proximal end of the catheter.

15. A method for capturing and treating blood clots in a blood vessel, the method comprising the steps of:

deploying a filter assembly in the blood vessel, the filter assembly comprising;

a filter comprising;

a hub having a distal end and a proximal end;

a plurality of struts extending distally from the hub; and

a tubular member passing through the hub, the tubular member having a distal end and a proximal end, the tubular member having a distal portion extending from the distal end of the hub to the distal end of the tubular member and a proximal portion extending from the proximal end of the hub to the proximal end of the tubular member, the distal portion of the tubular member having a plurality of perforations; and

a catheter in fluid communication with the tubular member, the catheter having a distal end and a proximal end, the distal end of the catheter being attached to the proximal end of the tubular member, the proximal end of the catheter residing outside the blood vessel;

injecting a fluid into the proximal end of the catheter.

16. The method of claim 15, wherein the fluid is a drug.

17. The method of claim 16, wherein the drug is an anti-coagulant.

18. The method of claim 17, wherein the anti-coagulant is heparin.

19. The method of claim 15, wherein the fluid is injected continuously over a period of time.

20. The method of claim 19, wherein the period of time is between two and six days.