Removal and repositioning device

• US 20060212042A1
• Filed: 12/22/2005
• Published: 09/21/2006
• Est. Priority Date: 03/17/2005
• Status: Abandoned Application

• Current Assignee: GI Dynamics Incorporated
• Original Assignee: GI Dynamics Incorporated
• Inventors: Melanson, David A., Lamport, Ronald B.
• Application Number:
  US11/318,083
• Publication Number:
  US 20060212042A1
• Time in Patent Office: Days
• US Class Current: 606/108
• CPC Class Codes: A61B 1/00089 Hoods
• CPC Class Codes: A61B 1/018 for receiving instruments
• 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 2017/00296 mounted on an endoscope
• CPC Class Codes: A61B 2017/00336 with a protective sleeve, e.g. retractable or slidable
• CPC Class Codes: A61B 2017/22035 for retrieving or repositioning foreign objects
• CPC Class Codes: A61B 2017/347 Locking means, e.g. for locking instrument in cannula
• CPC Class Codes: A61F 5/0089 Instruments for placement or removal

Abstract

A device for repositioning an implantable device within a natural bodily lumen includes an inner tube defining an internal lumen and adapted for insertion into a natural bodily lumen. An elongated member is slidably or rotatably disposed within the lumen of the inner tube, with a grasper disposed at the distal end of the elongated member adapted to grasp a portion of the implantable device. The implantable device, once grasped, can be at least partially collapsed. For example, a hook-shaped grasper grasps a drawstring of the implantable device, manipulating the drawstring and causing the implant to radially collapse. A retrieval hood is advanced over the collapsed portion of the implantable device. While maintaining its grasp, the repositioning device and the implantable device can then be repositioned or removed as one unit from the body by pulling the repositioning device from its proximal end.

Claims

1. A device for positioning an implantable device within a natural bodily lumen comprising:

an outer tube defining a lumen;

an inner tube defining a lumen and adapted for insertion into the outer tube;

an elongated member having a proximal end and a distal end, the elongated member slidably disposed within the lumen of the inner tube;

a grasper disposed at the distal end of the elongated member, adapted to engage an implantable device to collapse at least a portion of the implantable device when operated; and

a flared retrieval hood coupled to the distal end of the outer tube and adapted to capture at least a proximal portion of the implantable device when the implantable device is collapsed.

2. The repositioning device of claim 1, wherein a distal end of the outer tube is in communication with the retrieval hood, the outer tube used to advance the retrieval hood.

3. The repositioning device of claim 1, wherein the outer tube is an insertion tube of an endoscope.

4. The repositioning device of claim 1, wherein the elongated member is a wire.

5. The repositioning device of claim 1, wherein the grasper is a hook.

6. The repositioning device of claim 1, wherein the grasper is a spade.

7. The repositioning device of claim 1, wherein the grasper is a rat-tooth grasper.

8. The repositioning device of claim 1, wherein the inner tube is flexible.

9. The repositioning device of claim 1, wherein the retrieval hood is transparent.

10. The repositioning device of claim 1, wherein the retrieval hood is flexible.

11. The repositioning device of claim 1, wherein the retrieval hood includes an alignment feature to facilitate engagement of the implantable device.

12. The repositioning device of claim 11, wherein the alignment feature of the retrieval hood is an interior ramp.

13. The repositioning device of claim 1, wherein the elongated member is rotatably disposed within the lumen.

14. The repositioning device of claim 1, further comprising a grasper locking mechanism for locking the grasper in place, once the implantable device is collapsed.

15. The repositioning device of claim 1, further comprising a retrieval locking mechanism for locking the grasper with respect to the retrieval hood.

16. The repositioning device of claim 1, further comprising a radiopaque marker marking the distal end of the inner tube.

17. A method of repositioning an implantable device within a natural bodily lumen, the method comprising:

engaging a drawstring on the implantable device with a grasper disposed at a distal end of an elongated member within an inner tube;

drawing the grasper into a distal portion of the inner tube, when the drawstring is engaged by the grasper to radially collapse at least a proximal portion of the implantable device;

advancing a retrieval hood over at least a proximal portion of the implantable device when collapsed; and

moving the implantable device within the natural bodily lumen.

18. The method of claim 17, wherein engaging the drawstring further comprises grasping the drawstring with a retrieval hook disposed at the distal end of the elongated member.

19. The method of claim 17, wherein drawing the grasper further comprises first positioning a distal end of the inner tube and grasper disposed therein within an interior portion of the implantable device.

20. The method of claim 19, further comprising using a fluoroscope to confirm that the distal end of the inner tube and grasper disposed therein, have been positioned within the interior portion of the implantable device.

21. The method of claim 17, wherein drawing the grasper further comprises using a fluoroscope to confirm that the implantable device has been radially collapsed.

22. The method of claim 17, wherein drawing the grasper further comprises rotating the elongated member with the grasper disposed at the distal end of the elongated member.

23. The method of claim 17, wherein the retrieval hood is coupled to a distal end of an outer tube.

24. The method of claim 23, wherein the outer tube is an insertion tube of an endoscope.

25. The method of claim 17, wherein the retrieval hood is flared.

26. The method of claim 23, wherein advancing the retrieval hood further comprises pushing the outer tube over at least a proximal portion of the collapsed implantable device.

27. The method of claim 17, wherein moving the implantable device comprises removing the implantable device from the natural bodily lumen.

28. A method of repositioning an implantable device within a natural bodily lumen, the method comprising:

engaging a drawstring disposed on the implantable device with a grasper disposed at a distal end of an elongated member;

positioning the distal end of an inner tube and grasper disposed therein, within an interior portion of the implantable device;

collapsing radially at least a proximal portion of the implantable device by pulling the drawstring with the grasper; and

moving the implantable device within the natural bodily lumen.

29. The method of claim 28, wherein engaging the drawstring further comprises grasping the drawstring with a retrieval hook disposed at the distal end of the elongated member.

30. The method of claim 28, wherein engaging the drawstring further comprises drawing the grasper into a distal portion of the inner tube when the drawstring is engaged by the grasper.

31. The method of claim 28, wherein positioning further comprises using a fluoroscope to confirm that the distal end of the inner tube and grasper disposed therein, have been positioned within the interior portion of the implantable device.

32. The method of claim 28, wherein collapsing radially further comprises using a fluoroscope to confirm that the implantable device has been radially collapsed.

33. The method of claim 28, wherein collapsing radially further comprises rotating the elongated member with the grasper disposed at the distal end of the elongated member.

34. The method of claim 28, wherein moving the implantable device first comprises advancing a retrieval hood over at least a proximal portion of the collapsed implantable device.

35. The method of claim 34, wherein the retrieval hood is coupled to a distal end of an outer tube.

36. The method of claim 35, wherein the outer tube is an insertion tube of an endoscope.

37. The method of claim 34, wherein the retrieval hood is flared.

38. The method of claim 35, wherein advancing the retrieval hood further comprises pushing the outer tube over at least a proximal portion of the collapsed implantable device.

39. The method of claim 28, wherein moving the implantable device comprises removing the implantable device from the natural bodily lumen.