Retrievable filter

• US 8,029,529 B1
• Filed: 12/16/2008
• Issued: 10/04/2011
• Est. Priority Date: 01/19/2005
• 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.
• Primary Examiner(s): Erezo; Darwin
• Assistant Examiner(s): Dornbusch; Dianne
• Application Number:
  US12/336,454
• Time in Patent Office: 1,022 Days
• Field of Search: None
• US Class Current: 606/200
• CPC Class Codes: A61F 2/012 Multiple filtering units
• 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 2230/0078 hyperboloidal

Abstract

A vessel filter including a plurality of struts forming a first collapsible cone expanding radially outward in a proximal direction and a second collapsible cone expanding radially outward in a distal direction. A slidable member is disposed over the plurality of struts to collapse the struts toward a longitudinal axis of the vessel filter.

Claims

1. An implantable vascular device, comprising:

a first compressible filter including a first set of struts expanding radially away from a filter longitudinal axis in a proximal direction, each strut of the first set of struts including a stopper positioned adjacent an end thereof;

a second compressible filter including a second set of struts expanding radially away from the longitudinal axis in a distal direction, each strut of the second set of struts including a stopper positioned adjacent an end thereof;

a first slidable member disposed over at least the first set of struts, the first slidable member including a first body having an outer perimeter, the first set of struts disposed radially inside the outer perimeter of the first body, the first slidable member further including a first recovery member extending from the first body in a proximal direction; and

a second slidable member disposed over at least the second set of struts, the second slidable member including a second body having an outer perimeter, the second set of struts disposed radially inside the outer perimeter of the second body, the second slidable member further including a second recovery member extending from the second body in a distal direction,

wherein at least one of the first and second slidable members comprises a tubular structure including a plurality of channels, at least one of the first and second set of struts having each strut disposed in a corresponding channel of the plurality of channels.

2. The vascular device according to claim 1, wherein the first slidable member includes a first set of channels and the second slidable member includes a second set of channels, each of the first set of struts disposed in a corresponding channel of the first set of channels, and each of the second set of struts disposed in a corresponding channel of the second set of channels, the stopper of each of the first set of struts and second set of struts having a cross-sectional area greater than the channels of the first and second set of channels.

3. The vascular device according to claim 1, wherein each of the struts of the first set of struts and second set of struts includes a hook extending therefrom.

4. The vascular device according to claim 3, wherein each hook includes an elastic structure with a generally arcuate configuration in an operative condition and a generally linear configuration in a constrained condition.

5. The vascular device according to claim 3, wherein each hook has a cross-sectional area less than a cross-sectional area of the strut from which it extends.

6. The vascular device according to claim 1, wherein the first set of struts are coupled to the second set of struts.

7. A vessel filter, comprising:

a plurality of struts, a proximal portion of the plurality of struts forming a first collapsible cone expanding radially outward in a proximal direction, a distal portion of the plurality of struts forming a second collapsible cone expanding radially outward in a distal direction, each strut including a proximal hook extending from a proximal end and a distal hook extending from a distal end, each strut further including a proximal stopper positioned adjacent the proximal hook and a distal stopper positioned adjacent the distal hook;

a first slidable member disposed over the plurality of struts, the first slidable member including a first set of channels, each of the plurality of struts disposed in a corresponding channel of the first set of channels, the first slidable member further including a first recovery member extending in a proximal direction; and

a second slidable member disposed over the plurality of struts, the second slidable member including a second set of channels, each of the plurality of struts disposed in a corresponding channel of the second set of channels, the second slidable member further including a second recovery member extending in a distal direction, each proximal stopper and distal stopper having a cross-sectional area greater than each of the channels of the first set of channels and the second set of channels.

8. The vessel filter according to claim 7, wherein each hook includes an elastic structure with a generally arcuate configuration in an operative condition and a generally linear configuration in a constrained condition.

9. The vessel filter according to claim 7, wherein each hook has a cross-sectional area less than a cross-sectional area of the strut from which it extends.

10. An implantable vascular device, comprising:

a first compressible filter including a first set of struts expanding radially away from a filter longitudinal axis in a proximal direction, each strut of the first set of struts including a stopper positioned adjacent an end thereof;

a second compressible filter including a second set of struts expanding radially away from the longitudinal axis in a distal direction, each strut of the second set of struts including a stopper positioned adjacent an end thereof;

a first slidable member disposed over at least the first set of struts, the first slidable member including a first body having an outer perimeter, the first set of struts disposed radially inside the outer perimeter of the first body, the first slidable member further including a first recovery member extending from the first body in a proximal direction; and

a second slidable member disposed over at least the second set of struts, the second slidable member including a second body having an outer perimeter, the second set of struts disposed radially inside the outer perimeter of the second body, the second slidable member further including a second recovery member extending from the second body in a distal direction,

wherein the first slidable member includes a first set of channels and the second slidable member includes a second set of channels, each of the first set of struts disposed in a corresponding channel of the first set of channels, and each of the second set of struts disposed in a corresponding channel of the second set of channels, the stopper of each of the first set of struts and second set of struts having a cross-sectional area greater than the channels of the first and second set of channels.

11. The vascular device according to claim 10, wherein at least one of the first and second slidable members comprises a tubular structure.

12. The vascular device according to claim 10, wherein each of the struts of the first set of struts and second set of struts includes a hook extending therefrom.

13. The vascular device according to claim 12, wherein each hook includes an elastic structure with a generally arcuate configuration in an operative condition and a generally linear configuration in a constrained condition.

14. The vascular device according to claim 12, wherein each hook has a cross-sectional area less than a cross-sectional area of the strut from which it extends.

15. The vascular device according to claim 10, wherein the first set of struts are coupled to the second set of struts.