Articulating retrieval device

• US 20060229638A1
• Filed: 03/29/2005
• Published: 10/12/2006
• Est. Priority Date: 03/29/2005
• Status: Abandoned Application

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Inventors: Abrams, Robert M., Parikh, Riten
• Application Number:
  US11/092,644
• Publication Number:
  US 20060229638A1
• Time in Patent Office: Days
• US Class Current: 606/113
• 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: A61B 2017/00867 shape memory effect for prostheses A61F2210/0014
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61F 2/011 Instruments for their placement or removal
• CPC Class Codes: A61F 2/013 Distal protection devices, i.e. devices placed distally in combination with another endovascular procedure, e.g. angioplasty or stenting

Abstract

Device and methods for removing a foreign object from a body lumen are disclosed. A retrieval device in accordance with an exemplary embodiment of the present invention may include an elongated member including a flexible collector element, and a core wire that can be engaged by the physician to actuate the collector element between a first position and a second position with the body. The collector element may comprise a coiled section including a coiled flat ribbon adapted to assume a substantially straight shape in the first position and an expanded shape forming one or more helically oriented loops in the second position. In other embodiments, the collector element may comprise a filter basket including a plurality of filter struts adapted to expand in the second position.

Claims

1. A retrieval device for removing a foreign object from a body lumen, comprising:

a flexible coil actuatable between a first position and a second position within a body lumen, the flexible coil including a coiled flat ribbon adapted to assume a substantially straight shape in the first position and an expanded shape forming one or more of helically oriented loops in the second position; and

a core wire operatively coupled to the flexible coil, the core wire having a proximal section and a distal section.

2. The retrieval device of claim 1, wherein the coiled flat ribbon includes a superelastic material.

3. The retrieval device of claim 1, wherein the coiled flat ribbon includes a shape memory material.

4. The retrieval device of claim 1, wherein the coiled flat ribbon has a textured surface.

5. The retrieval device of claim 4, wherein the coiled flat ribbon includes a number of bumps or protrusions.

6. The retrieval device of claim 4, wherein said textured surface includes a nanoporous coating.

7. The retrieval device of claim 1, wherein said one or more loops are adapted to align circumferentially with the inner wall of the body lumen.

8. The retrieval device of claim 1, wherein said one or more loops comprise a single loop.

9. The retrieval device of claim 1, wherein said one or more loops comprise a plurality of loops.

10. The retrieval device of claim 9, wherein said plurality of loops have a distally tapering shape.

11. The retrieval device of claim 1, further comprising one or more fibers operatively coupled to the flexible coil, each fiber adapted to constrain longitudinal movement of the flexible coil in the second position.

12. The retrieval device of claim 11, wherein at least one of the fibers forms a proximal mouth of the flexible coil.

13. The retrieval device of claim 1, wherein the distal section of the core wire is adapted to strain at a rate greater than the proximal section of the core wire.

14. The retrieval device of claim 1, further comprising an actuator mechanism operatively coupled to the proximal section of the core wire.

15. A retrieval device for removing a foreign object from a body lumen, comprising:

an elongated member including a flexible coil section actuatable between a first position and a second position within a body lumen, the flexible coil section including a coiled flat ribbon adapted to assume a substantially straight shape in the first position and an expanded shape forming one or more of helically oriented loops in the second position;

a core wire operatively coupled to the flexible coil section, the core wire having a proximal section and a distal section; and

an actuator mechanism operatively coupled to the proximal section of the core wire.

16. The retrieval device of claim 15, wherein the coiled flat ribbon includes a superelastic material.

17. The retrieval device of claim 15, wherein the coiled flat ribbon includes a shape memory material.

18. The retrieval device of claim 15, wherein the coiled flat ribbon has a textured face.

19. The retrieval device of claim 18, wherein the coiled flat ribbon includes a number of bumps or protrusions.

20. The retrieval device of claim 18, wherein said textured surface includes a nanoporous coating.

21. The retrieval device of claim 15, wherein said one or more loops are adapted to align circumferentially with the inner wall of the body lumen.

22. The retrieval device of claim 15, wherein said one or more loops comprise a single loop.

23. The retrieval device of claim 15, wherein said one or more loops comprise a plurality of loops.

24. The retrieval device of claim 23, wherein said plurality of loops have a distally tapering shape.

25. The retrieval device of claim 15, further comprising one or more fibers operatively coupled to the flexible coil section, each fiber adapted to constrain longitudinal movement of the flexible coil section in the second position.

26. The retrieval device of claim 25, wherein at least one of the fibers forms a proximal mouth of the flexible coil section.

27. The retrieval device of claim 15, wherein the distal section of the core wire is adapted to strain at a rate greater than the proximal section of the core wire.

28. A retrieval device for removing a foreign object from a body lumen, comprising:

an elongated member including a flexible coil section actuatable between a first position and a second position within a body lumen, the flexible coil section including a coiled flat ribbon adapted to assume a substantially straight shape in the first position and an expanded shape forming one or more of helically oriented loops in the second position;

one or more fibers each operatively coupled at a plurality of locations to the coiled flat ribbon, each fiber adapted to constrain longitudinal movement of the flexible coil section in the second position;

a core wire operatively coupled to the flexible coil section, the core wire having a proximal section and a distal section; and

an actuator mechanism operatively coupled to the proximal section of the core wire.

29. A retrieval device for removing a foreign object from a body lumen, comprising:

an elongated member including a flexible coil section actuatable between a first position and a second position within a body lumen, the flexible coil section including a coiled flat ribbon adapted to assume a substantially straight shape in the first position and an expanded shape forming a plurality of helically oriented loops in the second position, the helically oriented loops having a distally tapered shape;

a core wire operatively coupled to the flexible coil section, the core wire having a proximal section and a distal section; and

an actuator mechanism operatively coupled to the proximal section of the core wire.

30. A retrieval device for removing a foreign object from a body lumen, comprising:

a pusher wire having a proximal section and a distal section;

a filter basket operatively coupled to the distal section of the pusher wire, the filter basket including a plurality of filter struts forming a number of expandable basket cells for capturing the foreign object; and

a core wire operatively coupled to one or more of the filter struts.

31. The retrieval device of claim 30, wherein the filter basket is configured to expand from a collapsed position to an expanded position in response to a proximal force applied to the core wire.

32. The retrieval device of claim 30, wherein the filter struts include a superelastic material.

33. The retrieval device of claim 30, wherein the filter struts include a shape memory material.

34. The retrieval device of claim 30, wherein the filter struts have a textured surface.

35. The retrieval device of claim 34, wherein the filter struts a number of bumps or protrusions.

36. The retrieval device of claim 34, wherein said textured surface includes a nanoporous coating.

37. The retrieval device of claim 30, further comprising a polymeric web covering attached to the filter struts.