Snare

• US 20030199921A1
• Filed: 06/09/2003
• Published: 10/23/2003
• Est. Priority Date: 12/23/1999
• Status: Active Grant

• Current Assignee: Abbott Cardiovascular Systems Incorporated (Abbott Laboratories Incorporated)
• Original Assignee: Christopher T. Shen, Larry Voss, Olin Palmer, Robert Laduca, Saypin Phonthalasa
• Inventors: Shen, Christopher T., LaDuca, Robert, Phonthalasa, Saypin, Palmer, Olin, Voss, Larry
• Granted Patent: US 6,913,612 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• 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 2017/00526 Methods of manufacturing
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

An intravascular snare device for use in capturing debris found in blood vessels. The snare device is fabricated from a tube and includes longitudinally and circumferentially extending members. The snare device specifically embodies structure that provides enhanced radial opening and angular resistance to collapse.

Claims

1. A device, comprising:

an elongate member having a first end and a second end, said second end extending exterior of the vasculature;

a body manufactured from a tube having generally circumferentially directed components and generally longitudinally directed components, said body being attached to said second end of said elongate member.

2. The device of claim 1, said body further comprising an open first end and a substantially closed second end.

3. The device of claim 2, wherein said elongate member extends from said open first end.

4. The device of claim 2, wherein said body has a longitudinal axis and is defined by a generally tubular sidewall, said elongate member extending from said sidewall in a parallel relationship with said longitudinal axis.

5. The device of claim 4, wherein said body has a compressed configuration and an expanded configuration, said elongate member being substantially removed from a path to said open end when said body is in at least its expanded configuration.

6. The device of claim 1, said body further comprising a first end portion, a second end portion and a midsection.

7. The device of claim 6, said first end portion of said body further comprising a plurality of apertures.

8. The device of claim 7, wherein said plurality of apertures include a generally diamond-shaped aperture configured between a first pair of spaced parallelogram-shaped apertures.

9. The device of claim 8, wherein said diamond-shaped aperture includes a first terminal end and a second terminal end, said elongate member extending from said first terminal end of said diamond-shaped aperture.

10. The device of claim 6, said second end portion of said body further comprising a plurality of apertures.

11. The device of claim 10, wherein said plurality of apertures include a pair of spaced parallelogram-shaped apertures.

12. The device of claim 6, said midsection further comprising a plurality of longitudinally extending members.

13. The device of claim 12, wherein said plurality of longitudinally extending members are generally parallel to each other.

14. The device of claim 12, wherein each of said plurality of longitudinally extending members define a helical pattern.

15. The device of claim 6, said first end portion further comprising a pair of the diverging undulating members, each said diverging member having a first end and a second end, said first end of said diverging members being affixed to said second end of said elongate member.

16. The device of claim 6, said body further comprising a plurality of nested rings.

17. The device of claim 6, said body further comprising a plurality of almond-shaped openings.

18. The device of claim 6, said second portion further comprising a plurality of extensions.

19. The device of claim 1, said body further comprising an open first end and an open second end.

20. The device of claim 19, said second open end further comprising a plurality of loops.

21. The device of claim 20, said device further comprising a braided tubular structure, said braided tubular structure having a first terminal end and a second terminal end, said second terminal end being attached to said plurality of loops.

22. The device of claim 21, wherein said second terminal end of said tubular structure is substantially closed.

23. The device of claim 1, said device further comprising a generally tubular delivery catheter, said delivery catheter including an internal lumen sized to slidably receive said elongate member and said body.

24. The device of claim 1, wherein said device is fabricated from a tubular element using a laser.

25. The device of claim 1, wherein said device is made from self-expanding, superelastic, or shape memory material.

26. The device of claim 1, said body further comprising a distal tip portion.

27. The device of claim 26, said distal tip portion further comprising a first coil and a second coil, said second coil being cooaxially arranged about at least a portion of said first coil.

28. The device of claim 26, said distal tip portion further comprising a blunt terminal end formed from a soldered joint.

29. The device of claim 27, wherein said first coil comprises nitinol.

30. The device of claim 27, wherein said second coil comprises about 90% platinum and 10% iridium alloy.

31. The device of claim 1, said body further comprising a tab connected to a first end portion, wherein there exists a curved transition from said tab to said first end portion.

32. A medical device for treating an interior of a patient, comprising:

a body cut from a tubular element, said body including a first ring having first and second ends, a plurality of first generally longitudinally extending members attached to said first end of said ring and a plurality of second generally longitudinally extending members defining a closed terminal end of said body; and

an elongate member having a first end portion and a second end portion, said second end portion being affixed to said body and said second end portion extending exterior of the patient.

33. The device of claim 32, wherein said plurality of first longitudinally extending members provide an opening to an interior of said body.

34. The device of claim 33, wherein said plurality of first longitudinally extending members converge into a single tab member, said tab member projecting from a sidewall defining said opening and being displaced from a path leading to said opening.

35. The device of claim 33, wherein said tab is affixed to said elongate member to thereby ensure that said elongate member is displaced from said path to said opening to said body.

36. The device of claim 32, wherein said ring is self-expanding and operates to provide a consistent opening to an interior to said body.

37. The device of claim 32, wherein said ring has a generally sinusoidal configuration.

38. The device of claim 37, said ring further comprising generally straight elements defining said sinusoidal configuration.

39. The device of claim 38, wherein each of said straight elements have an approximate equal length.

40. The device of claim 39, wherein said straight elements have varied lengths.

41. The device of claim 37, wherein said ring has a four crown design.

42. The device of claim 32, said body further comprising:

a midsection connected to said first ring; and

a second ring positioned between said midsection and said plurality of second longitudinally extending members.

43. The device of claim 42, wherein said midsection is defined by a plurality of parallel members extending longitudinally.

44. The device of claim 43, wherein said plurality of parallel members are each configured into a helical pattern.

45. The device of claim 42, wherein said second ring is self-expanding and operates to provide said body with a tubular basket configuration.

46. The device of claim 42, wherein said second ring has a four crown design.

47. A method involving a snare device that is capable of being slideably received within a guide catheter that includes a detachable adapter comprising the steps of:

configuring the snare device to capture undesirable material;

withdrawing the snare device to a position adjacent an opening to the guide catheter;

aspirating the guide catheter while withdrawing the snare device into the guide catheter;

maintaining aspirations until the snare device is positioned within the adapter; and

detaching the adapter, with the snare device contained therein, from the guide catheter.

48. The method of claim 47, wherein said configuring step further includes positioning the snare device within vasculature of a patient.

49. The method of claim 47, wherein said configuring step further includes positioning the snare device within intracranial vasculature of a patient.

50. The method of claim 47, wherein said configuring step further includes positioning the snare device distal of a blood clot within intracranial vasculature of a patient.

51. The method of claim 48, further comprising the step of allowing a moment of bleed back from the vasculature and through the guide catheter to flush any loose undesirable material.

52. The method of claim 50, further comprising the step of attaching a supplemental adapter to the guide catheter.

53. The method of claim 52, further comprising the step of flushing the guide with saline.