Distal release retrieval assembly and related methods of use

• US 20060195118A1
• Filed: 02/28/2005
• Published: 08/31/2006
• Est. Priority Date: 02/28/2005
• Status: Active Grant

• Current Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Original Assignee: Boston Scientific Scimed, Inc. (Boston Scientific Corporation)
• Inventors: Richardson, Kevin
• Granted Patent: US 8,109,941 B2
• 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 17/32056 Surgical snare instruments for removing or smashing calculi A61B2017/2212; tonsillotomes A61B17/26
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end

Abstract

A device and related method of use is provided for the capture and removal of various unwanted objects present within the body'"'"'s anatomical lumens. In an embodiment of the present disclosure, the device includes an external elongate member; an internal elongate member disposed within the external elongate member; and a retrieval assembly connected to the internal elongate member and retractable within and extendable from a lumen of the external elongate member. The retrieval assembly includes an end configured to be selectively open or substantially closed.

Claims

1. A medical device comprising:

an external elongate member having a proximal end, a distal end, and a lumen extending longitudinally between the proximal and distal ends;

an internal elongate member extending within the lumen of the external elongate member and moveable relative to the external elongate member;

a retrieval assembly connected to a distal end of the internal elongate member, retractable within and extendable from the lumen of the external elongate member, and having an end configured to be selectively open or substantially closed; and

a flexible member integrated with the end of the retrieval assembly for substantially closing the end of the retrieval assembly.

2. The device of claim 1, wherein the end configured to be selectively open or substantially closed comprises a distal end of the retrieval assembly.

3. The device of claim 1, further including an actuator having a proximal end actuable by a user for substantially closing or opening the end configured to be selectively open or substantially closed.

4. The device of claim 3, wherein the actuator extends within a lumen of the internal elongate member.

5. The device of claim 1, wherein the flexible member is interweaved with the end configured to be selectively open or substantially closed.

6. The device of claim 3, wherein the flexible member and actuator comprise the same material.

7. The device of claim 3, wherein the flexible member and actuator comprise a one-piece construction.

8. The device of claim 1, wherein the internal elongate member is connected to a proximal end of the retrieval assembly.

9. The device of claim 1, wherein the retrieval assembly further comprises a scaffolding having wires that cross each other at points, at least some of the wires being connected at the points.

10. The device of claim 9, wherein at least some of the wires that cross each other are unconnected at the points.

11. The device of claim 9, wherein the scaffolding defines a plurality of spaces between wires of the scaffolding.

12. The device of claim 1, wherein the retrieval assembly is configured to be selectively expanded or substantially collapsed.

13. The device of claim 12, wherein the retrieval assembly is configured to be substantially collapsed when retracted into the external elongate member.

14. The device of claim 12, wherein the end configured to be selectively open or substantially closed is adapted to be selectively open when the retrieval assembly is expanded or substantially collapsed.

15. The device of claim 12, wherein the end configured to be selectively open or substantially closed is adapted to be substantially closed when the retrieval assembly is expanded or substantially collapsed.

16. The device of claim 1, wherein the internal elongate member defines a plurality of lumens.

17. The device of claim 16, wherein the plurality of lumens includes a first lumen accommodating an actuator for substantially closing or opening the end configured to be selectively open or substantially closed, and a second lumen configured to accommodate a guidewire.

18. A medical device comprising:

an external elongate member having a proximal end, a distal end, and a lumen extending longitudinally between the proximal and distal ends;

an internal elongate member extending within the lumen of the external elongate member and moveable relative to the external elongate member; and

a retrieval assembly connected to a distal end of the internal elongate member, retractable within and extendable from the lumen of the external elongate member, and having an end configured to be selectively open or substantially closed, wherein the end configured to be selectively open or substantially closed is adapted to be selectively open when the retrieval assembly is expanded or substantially collapsed.

19. The device of claim 18, further including a flexible member interweaved with the end of the retrieval assembly for substantially closing the end of the retrieval assembly.

20. The device of claim 19, further including an actuator having a proximal end actuable by a user for substantially closing or opening the end configured to be selectively open or substantially closed.

21. The device of claim 18, wherein the retrieval assembly further comprises a scaffolding having wires that cross each other at points, at least some of the wires being connected at the points.

22. The device of claim 21, wherein at least some of the wires that cross each other are unconnected at the points.

23. The device of claim 21, wherein the scaffolding defines a plurality of spaces between wires of the scaffolding.

24. The device of claim 18, wherein the retrieval assembly is configured to be selectively expanded or substantially collapsed.

25. A method of entrapping and removing an object from within a body, comprising:

inserting a medical device into a body lumen, the medical device comprising;

an external elongate member having a proximal end, a distal end, and a lumen extending longitudinally between the proximal and distal ends,

an internal elongate member extending within the lumen of the external elongate member,

a retrieval assembly connected to a distal end of the internal elongate member and having an end configured to be selectively open or substantially closed, and

a flexible member integrated with the end configured to be selectively open or substantially closed;

advancing said medical device to a desired body location;

extending said internal elongate member and retrieval assembly distally relative to the external elongate member to deploy said retrieval assembly within a body lumen;

entrapping the object within the retrieval assembly; and

,

removing said medical device and entrapped object from within the body.

26. The method of claim 25, wherein said external elongate member is retrieved proximally to deploy said retrieval assembly within a body lumen.

27. The method of claim 25, wherein said internal elongate member defines a plurality of lumens.

28. The method of claim 27, wherein the plurality of lumens includes a first lumen accommodating an actuator for substantially closing or opening the end configured to be selectively open or substantially closed, and a second lumen configured to accommodate a guidewire.

29. The method of claim 25, further comprising the step of substantially closing said end configured to be selectively open or substantially closed.

30. The method of claim 29, wherein said step of substantially closing the end configured to be selectively open or substantially closed is performed after the retrieval assembly is deployed within a body lumen.

31. The method of claim 29, wherein said step of substantially closing the end configured to be selectively open or substantially closed is performed prior to the step of deploying said retrieval assembly within a body lumen.

32. The method of claim 25, wherein the retrieval assembly further comprises a scaffolding having wires that cross each other at points, at least some of the wires being connected at the points.

33. The method of claim 32, wherein at least some of the wires that cross each other are unconnected at the points.

34. The method of claim 32, wherein the scaffolding defines a plurality of spaces between the wires of the scaffolding.

35. The method of claim 25, wherein the end configured to be selectively open or substantially closed comprises a distal end of the retrieval assembly.

36. The method of claim 25, wherein the flexible member is interweaved with the end configured to be selectively open or substantially closed.

37. The method of claim 25, wherein the device further includes an actuator having a proximal end actuable by a user for substantially closing or opening the end configured to be selectively open or substantially closed.

38. The method of claim 37, further comprising the step of actuating the actuator to substantially close the end configured to be selectively open or substantially closed.

39. The method of claim 38, wherein the step of actuating the actuator to substantially close the end configured to be selectively open or substantially closed is performed before the retrieval assembly is deployed within a body lumen.

40. The method of claim 38, wherein the step of actuating the actuator to substantially close the end configured to be selectively open or substantially closed is performed after the retrieval assembly is deployed within a body lumen.

41. The method of claim 37, further comprising the step of manipulating the actuator to open the end configured to be selectively open or substantially closed.

42. The method of claim 41, wherein the step of manipulating the actuator to open the end configured to be selectively open or substantially closed is performed prior to removing the medical device from within a body.

43. The method of claim 42, further comprising releasing the object from the retrieval assembly after opening the end configured to be selectively open or substantially closed.

44. The method of claim 25, wherein the internal elongate member is connected to a proximal end of the retrieval assembly.

45. The method of claim 25, wherein the retrieval assembly is configured to be selectively expanded or substantially collapsed.

46. The method of claim 45, further comprising the step of expanding the retrieval assembly.

47. The method of claim 46, wherein the step of expanding the retrieval assembly is performed prior to the step of entrapping the object within the retrieval assembly.

48. The method of claim 29, wherein the retrieval assembly is configured to be selectively expanded or substantially collapsed.

49. The method of claim 48, further comprising the step of expanding the retrieval assembly.

50. The method of claim 49, wherein the step of substantially closing the end configured to be selectively open or substantially closed is performed prior to the step of expanding the retrieval assembly.

51. The method of claim 49, wherein the step of substantially closing the end configured to be selectively open or substantially closed is performed after the step of expanding the retrieval assembly.

52. The method of claim 41, wherein the retrieval assembly is configured to be selectively expanded or substantially collapsed.

53. The method of claim 52, further comprising the step of expanding the retrieval assembly.

54. The method of claim 53, wherein the step of manipulating the actuator to open the end configured to be selectively open or substantially closed is performed prior to the step of expanding the retrieval assembly.

55. The method of claim 53, wherein the step of manipulating the actuator to open the end configured to be selectively open or substantially closed is performed after the step of expanding the retrieval assembly.