VENA CAVA FILTER FORMED FROM A SHEET

• US 20090299404A1
• Filed: 04/16/2007
• Published: 12/03/2009
• Est. Priority Date: 05/02/2006
• Status: Active Grant

• Current Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Original Assignee: C.R. Bard, Inc. (Becton, Dickinson & Co)
• Inventors: Chanduszko, Andrzej J., Smale, Joshua A.
• Granted Patent: US 10,188,496 B2
• 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 2/0105 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 2230/0058 X-shaped
• CPC Class Codes: A61F 2230/008 paraboloidal
• CPC Class Codes: A61F 2230/0093 Umbrella-shaped, e.g. mushroom-shaped

Abstract

A filter formed from a sheet is described herein. In one aspect of the invention, a filter is formed from a sheet of material and, following removal of portions of the sheet, the filter is folded into a shape for insertion into a blood vessel. In another aspect of the invention, features for a filter are formed from a sheet of material and incorporated into the filter.

Claims

1. A filter for placement in a blood vessel, the filter comprising:

a body defining a longitudinal axis, the body having a generally planar surface extending generally parallel to the longitudinal axis; and

a plurality of appendages extending away from the longitudinal axis, at least one of the plurality of appendages having a generally planar surface.

2. The filter of claim 1, wherein the at least one of the plurality of appendages comprises a cross-section selected from a group consisting essentially of generally rectangular and square cross-sections and combinations thereof.

3. The filter of claim 2, wherein each of the plurality of appendages comprise a cross-section selected from a group consisting essentially of generally rectangular and square cross-sections, and combinations thereof.

4. The filter of claim 3, wherein at least one of the appendages comprises an anchor member.

5. (canceled)

6. A filter, comprising:

a longitudinal body including a proximal section having a first cross-sectional area, a distal section having a second cross-sectional area, and a joining section positioned between the proximal and distal sections having a third cross-sectional area less than both the first and second cross-sectional areas; and

a plurality of appendages having a proximal end joined to a hub such that the appendages in a non-stressed position lie in a plane generally oblique to the longitudinal body, the hub including an opening configured for movement along a length of the joining section.

7. The filter according to claim 6, wherein the proximal section and distal section of the body are generally tubular.

8. The filter according to claim 7, wherein the first cross-sectional area is approximately equivalent to the second cross-sectional area.

9. The filter according to claim 7, wherein the joining section is generally tubular, and wherein the opening has a diameter less than the diameter of the proximal section and distal section.

10. The filter according to claim 6, wherein the joining section has a length between approximately 0.5 mm and approximately 40 mm.

11. The filter according to claim 6, wherein at least one of the proximal section and distal section have a non-circular cross-sectional shape.

12. The filter according to claim 6, wherein the appendages are formed from a single sheet of material having a thickness between approximately 0.1 mm and approximately 0.4 mm.

14. The filter according to claim 12, wherein the sheet comprises a material selected from the group consisting essentially of stainless steel, shape memory metals, shape memory alloys, shape memory metal alloys, metal alloys, linear elastic shape memory alloy, shape memory polymers, polymers, bio-resorbable materials and combinations thereof.

16. The filter according to claim 6, wherein one or more of the appendages includes a width that decreases in a direction away from the body.

20. The filter according to claim 6, further comprising a retrieval member connected to the proximal section of the body.

21. The filter according to claim 6, wherein the appendages are stressed in a generally curved configuration to extend generally in either a proximal or distal direction.

22. The filter according to claim 6, wherein at least a portion of the body includes a length with a lumen, a wall of the body along the length of the lumen including a plurality of pores in fluid communication with the lumen.

13. (canceled)

15. (canceled)

17-19. -19. (canceled)

23-36. -36. (canceled)

37. A filter, comprising:

a longitudinal body including a proximal section, an intermediate section, and a distal section;

a first joining section positioned between the proximal section and the intermediate section and a second joining section positioned between the intermediate section and the distal section, the first and second joining sections each having a cross-sectional area less than a cross-sectional area of the proximal section, the intermediate section and the distal section;

a first set of appendages having a proximal end joined to a first hub such that the appendages in a non-stressed position lie in a plane generally oblique to the longitudinal body, the first hub positioned along the first joining section and including an opening configured for movement along a length of the first joining section; and

a second set of appendages having a proximal end joined to a second hub such that the appendages in a non-stressed position lie in a plane generally oblique to the longitudinal body, the second hub positioned along the second joining section and including an opening configured for movement along a length of the second joining section.

38. The filter according to claim 37, wherein the proximal section, the intermediate section, and the distal section are generally tubular.

39. The filter according to claim 38, wherein the first and second joining sections are generally tubular, and wherein the openings thereof have a diameter less than the diameter of the proximal section, intermediate section and distal section.

40. The filter according to claim 37, wherein the first and second joining sections have a length between approximately 0.5 mm and approximately 40 mm.

41-66. -66. (canceled)