Vena Cava Filter with Stent

• US 20090105747A1
• Filed: 12/01/2006
• Published: 04/23/2009
• Est. Priority Date: 12/07/2005
• Status: Abandoned Application

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Smale, Joshua A., Chanduszko, Andrzej J.
• Application Number:
  US12/095,991
• Publication Number:
  US 20090105747A1
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/852 Two or more distinct overlapping stents
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/016 made from wire-like elements
• CPC Class Codes: A61F 2220/0008 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2230/0006 circular
• CPC Class Codes: A61F 2230/005 Rosette-shaped, e.g. star-shaped
• CPC Class Codes: A61F 2230/0054 V-shaped
• 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: A61F 2250/0063 Nested prosthetic parts

Abstract

An implantable medical device is described, including a filtering element and radially expandable structure. In one variation, the filtering element may include a pluralit of filaments attached to the structure, the filaments being joined together at a proximal en thereof. The filtering element may include strut members and a hub attached to the proxima end of the filaments. The filaments may be made of suture material. In another variation, the filtering element may include a filter with a plurality of legs, the filter being attached to the support structure via a plurality of filaments.

Claims

1. An implantable medical device, comprising:

a radially expandable structure, having an open proximal end and an open distal end; and

a plurality of filaments attached to the structure proximate at least one of the ends, the filaments being connected together to define a first filtering element.

2. The implantable medical device according to claim 1, wherein a retrieval member is attached to the filtering element.

3. The implantable medical device according to claim 1, wherein the filtering element comprises strut members having a distal end attached to the structure.

4. The implantable medical device according to claim 3, wherein the strut members have a proximal end attached to a retrieval member.

5. The implantable medical device according to claim 1, further comprising a second filtering element attached to the structure proximate the other of the ends, the second filtering element including a plurality of filaments connected together.

6. The implantable medical device according to claim 1, wherein the structure comprises structure selected from the group consisting of a self-expanding stent, balloon-expandable stent, a stent having a substantial portion of the stent covered in a bio-compatible polymer, and combinations thereof.

7. The implantable medical device according to claim 6, wherein the bio-compatible polymer is selected from a group consisting essentially of Dacron, polyester, PTFE, ePTFE, polyurethane, polyurethane-urea, siloxane, and combinations thereof.

8. The implantable medical device according to claim 7, further comprising a framework having a plurality of first ends connected to the structure and a plurality of second ends connected to each other, the framework comprising a bio-resorbable material.

9. The implantable medical device according to claim 1, wherein the filaments comprise a resorbable material.

10. The implantable medical device according to claim 1, wherein the filaments comprise suture material.

11. The implantable medical device according to claim 1, wherein each of the filaments is connected to an anchoring device having a curved profile.

12. An implantable medical device, comprising:

a filter including a plurality of legs joined at a proximal end to a hub;

a radially expandable structure, having an open proximal end and an open distal end; and

a plurality of filaments attaching the filter to the structure.

13. The implantable medical device according to claim 12, wherein the filter comprises a plurality of arms having a length less than a length of the legs, the arms joined at a proximal end to the hub.

14. The implantable medical device according to claim 13, wherein the filaments are attached to one or more of at least one of the arms and the legs at an attachment location.

15. The implantable medical device according to claim 14, wherein a distal end of the arms comprise a curved portion.

16. The implantable medical device according to claim 12, wherein a distal end of at least one of the legs terminates in a hook.

17. The implantable medical device of claim 16, wherein the hook comprises a generally curved profile having a cross-sectional area smaller than a cross-sectional area of at least the leg.

18. The implantable medical device according to claim 12, wherein the hub comprises a retrieval member.

19. The implantable medical device according to claim 12, wherein the structure comprises structure selected from a group consisting of a self-expanding stent, balloon-expandable stent, a stent having a substantial portion of the stent covered in a bio-compatible polymer, and combinations thereof.

20. The implantable medical device according to claim 19, wherein the bio-compatible polymer is selected from a group consisting essentially of Dacron, polyester, PTFE, ePTFE, polyurethane, polyurethane-urea, siloxane, and combinations thereof.

21. The implantable medical device according to claim 12, wherein at least one of the filter and radially expandable structure comprises a bio-resorbable material.

22. The implantable medical device according to claim 12, wherein the filaments comprise suture material.

23. The implantable medical device according to claim 12, wherein at least a portion of the filter is in contact with the structure.

24. An implantable medical device, comprising:

a radially expandable structure, having an open proximal end and an open distal end defining a longitudinal axis extending therethrough; and

a filter including a plurality of appendages disposed partly inside the radially expandable structure and joined at a proximal end to a hub.

25. The device of claim 24, wherein the plurality of appendages comprises first appendages that extend obliquely with respect to the longitudinal axis in a first direction.

26. The device of claim 25, wherein the plurality of appendages comprises second appendages that extend obliquely with respect to the longitudinal axis in at least one of a first direction and second direction opposite to the first direction.

27. The device of claim 26, wherein at least one of the appendages terminates in a hook.

28. The device of claim 27, wherein the hook comprises a generally curved profile having a cross-sectional area smaller than a cross-sectional area of one of the plurality of appendages.

29. The device of claim 28, wherein the hub further comprises a member that translates with respect to the hub along the longitudinal axis so as to compress the appendages in a direction generally parallel to the longitudinal axis.

30. A method of filtering blood in a blood vessel, comprising:

introducing an implantable medical device into a blood vessel in a collapsed configuration;

deploying the implantable medical device into the blood vessel, the device translating to an expanded configuration having a support structure for the blood vessel wall and a filter structure for blood flowing through the vessel; and

separating the filter structure from the support structure after a predetermined time period.

31. The method of claim 30, wherein the separating further comprises removing the filter from the blood vessel.

32. The method of claim 30, wherein the separating further comprises bioresorbing the support structure in the blood vessel.