Retrievable endoluminal filter

• US 9,463,038 B2
• Filed: 06/28/2013
• Issued: 10/11/2016
• Est. Priority Date: 01/03/2005
• Status: Expired due to Fees

• Current Assignee: Crux Biomedical, Inc. (Koninklijke Philips N.V.)
• Original Assignee: Crux Biomedical, Inc. (Koninklijke Philips N.V.)
• Inventors: Johnson, Eric, Fogarty, Thomas J., Arko, Frank, Elkins, Jeff, Seery, Martin
• Primary Examiner(s): STRANSKY, KATRINA MARIE
• Application Number:
  US13/931,462
• Publication Number:
  US 20130289611A1
• Time in Patent Office: 1,201 Days
• Field of Search: 606/200, 606110-114, 606/127, 606/159
• US Class Current: 1/1
• 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: A61F 2/01 Filters implantable into blood vessels
• 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 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• CPC Class Codes: A61F 2230/0008 elliptical or oval
• CPC Class Codes: A61F 2230/001 Figure-8-shaped, e.g. hourglass-shaped
• CPC Class Codes: A61F 2230/0067 conical
• CPC Class Codes: A61F 2230/0095 Saddle-shaped
• CPC Class Codes: A61F 2250/0067 Means for introducing or releasing pharmaceutical products into the body
• CPC Class Codes: A61M 2025/0037 characterized by lumina being arranged side-by-side
• CPC Class Codes: A61M 2025/004 characterized by lumina being arranged circumferentially
• CPC Class Codes: A61M 25/0021 characterised by the form of the tubing A61M25/0054 takes precedence
• CPC Class Codes: A61M 25/007 Side holes, e.g. their profiles or arrangements; Provisions to keep side holes unblocked

Abstract

In one embodiment of the present invention there is provided a filter having a first support member having a first end and a second end; a second support member joined to the first support member at the first end and positioned adjacent the first support member to form a support frame; a material capture structure within the support frame; and a retrieval feature on the first end and on the second end. In one aspect, the first support member or the second support member has a spiral shape.

Claims

1. An implantable filter for implantation in a body lumen defined by an interior lumen wall, comprising:

a first support member having a first end and a second end;

a second support member joined to the first support member at the first end and positioned adjacent to and crossing the first support member at a movable crossover point to form a support frame between the first end and the movable crossover point;

a material capture structure within the support frame; and

a retrieval feature on the first end and a retrieval feature on the second end, wherein a plane aligned along a longitudinal axis of the filter includes the first end and the second end, wherein the retrieval feature on the first end is configured to be disposed against the interior lumen wall after implantation into the body lumen such that the retrieval feature extends radially inwards from the interior lumen wall towards a central axis of the filter, and wherein the filter is configured to be disposed within the lumen after implantation such that the first end and the second end are positioned along the interior lumen wall opposite from the movable crossover point, and the material capture structure is positioned between at least one of the first end or the second end and the movable crossover point.

2. The filter of claim 1 wherein the first support member or the second support member has a spiral shape.

3. The filter of claim 1 wherein the retrieval feature on the first end is positioned where the second support member is joined to the first support member.

4. The filter of claim 1 wherein the support frame is adjacent to the first end.

5. The filter of claim 1 wherein at least one of the retrieval features on the first end and on the second end comprises a curved section.

6. The filter of claim 1 wherein at least one of the retrieval features on the first end and on the second end is generally shaped like a sinusoid.

7. The filter of claim 1 wherein the retrieval feature on the first end and the first support member are formed from a single piece of material.

8. The filter of claim 1 further comprising:

a generally cylindrically shaped cover around the first and second support members where the second support member is joined to the first support member.

9. The filter of claim 8 wherein the generally cylindrically shaped cover has a tapered end.

10. The filter of claim 8 wherein the generally cylindrically shaped cover joins the retrieval feature to the first end.

11. The filter of claim 7 wherein a retrieval feature diameter is smaller than a first support member diameter.

12. The filter of claim 1 wherein the second support member crosses the first support member only once.

13. The filter of claim 1 wherein the plane aligned along the longitudinal axis of the filter includes the retrieval feature on the first end or the retrieval feature on the second end.

14. The filter of claim 1 wherein the retrieval feature on the second end of the first support member is positioned where the second support member is joined to the first support member at the second end.

15. The filter of claim 1 wherein the support frame further comprising:

a section where the first support member and the second support member converge towards one another.

16. The filter of claim 15 wherein the section is adjacent the movable crossover point.

17. The filter of claim 1 the support frame further comprising:

a section where the first support member and the second support member diverge away from one another.

18. The filter of claim 17 wherein the section is adjacent the first end.

19. A device, comprising:

a first elongate, clockwise spiral support element having a first end and a second end;

a second elongate, counterclockwise spiral support element attached to the first end and positioned opposite of a portion of the first elongate spiral support element and forming a movable crossover point between the first end and the second end, wherein the first elongate spiral support element and the second elongate spiral support element form an adjustable loop between the first end and the movable crossover point;

a filter attached to the second elongate spiral support element and attached to the portion of the first elongate spiral support element between the first end and the movable crossover point; and

a retrieval feature attached to the first end, wherein the retrieval feature on the first end is located at a first point on the adjustable loop and the movable crossover point is located at a second point on the adjustable loop, wherein the first point is located opposite the second point on the adjustable loop, and wherein the device is configured to be disposed within a lumen after implantation, the lumen having an interior wall, such that the first end and the second end are positioned along the interior wall opposite from the movable crossover point, and the filter is positioned between at least one of the first end or the second end and the movable crossover point.

20. A device according to claim 19 wherein the retrieval feature has a curved shape.

21. A device according to claim 19 wherein the retrieval feature comprises a ball.

22. A device according to claim 19 wherein the retrieval feature has a smaller diameter than either of the elongate supports.

23. A device according to claim 19 wherein the retrieval feature comprises a radio opaque marker.

24. A device according to claim 19 wherein the retrieval feature has a sinusoidal shape.

25. A device according to claim 19 wherein the retrieval feature has a spiral shape.

26. A device according to claim 19 wherein the retrieval feature is configured to collapse when engaged by a retrieval device.

27. A device according to claim 19 wherein the second elongate spiral support element is attached to the second end.

28. A device according to claim 19, further comprising:

a retrieval feature attached to the second end.

29. A device according to claim 28 wherein the retrieval feature attached to the second end is the same shape as the retrieval feature attached to the first end.

30. A device according to claim 28 wherein the retrieval features are positioned on the same side of an axis including the first end and the second end.

31. A device according to claim 30 wherein the retrieval features and the filter are on the same side of the axis including the first end and the second end.

32. A device according to claim 30 wherein the retrieval features and the crossing are on the same side of the axis including the first end and the second end.