COMPLEX WIRE FORMED DEVICES

• US 20080262528A1
• Filed: 04/17/2007
• Published: 10/23/2008
• Est. Priority Date: 04/17/2007
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Lazarus Effect, Inc. (Medtronic Plc)
• Inventors: Martin, Brian B.
• Granted Patent: US 8,535,334 B2
• Time in Patent Office: Days
• US Class Current: 606/191
• 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 2017/00867 shape memory effect for prostheses A61F2210/0014
• 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
• CPC Class Codes: A61B 2017/2217 single wire changing shape to a gripping configuration
• 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

The devices and methods described herein relate to jointless construction of complex structures. Such devices have applicability in through-out the body, including clearing of blockages within body lumens, such as the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen

Claims

1. A medical device for delivery through a catheter, the medical device comprising:

a main bundle comprising a group of wires having a first end extending through the catheter and a second end;

where the main bundle of wires diverge at the second end to form a first shaped section, the first shaped section farther comprises an expanded profile and a reduced profile for delivery through the catheter;

a plurality of individual subsets of wires each diverging from the first shaped section to form a second shaped section;

where the individual subsets of wires converge to form a third shaped section, where the third shaped section comprises an expanded profile and a reduced profile for delivery through the catheter; and

where the convergence and divergence of wires occurs without junctions between wires.

2. The medical device of claim 1, where the main bundle diverges at the second end in at least two portions before forming the first shaped section.

3. The medical device of claim 1, where the main bundle extends for a length sufficient to withdraw the device from a body of a patient.

4. The medical device of claim 1, where the main bundle of wires includes at least a first wire and a second wire where the first and second wire each have different characteristics.

5. The medical device of claim 4, where the characteristics are selected from a group consisting of material, cross-sectional shape, and cross-sectional size.

6. The medical device of claim 4, where the characteristics are selected from a group consisting of brittleness, ductility, elasticity, hardness, malleability, plasticity, strength, and toughness.

7. The medical device of claim 1, where the main bundle of wires includes at least one shape memory alloy wire.

8. The medical device of claim 1, where the main bundle of wires includes at least one super-elastic wire.

9. The medical device of claim 1, where the main bundle of wires includes at least one polymeric wire.

10. The medical device of claim 1, where the main bundle of wires includes at least one wire comprising a metal alloy.

11. The medical device of claim 10, where the metal alloy comprises an alloy selected from the group consisting of stainless steel, titanium, platinum and gold, iridium, tantalum, nitinol, and combinations thereof.

12. The medical device of claim 1, further comprising at least one radiopaque material located on the first shaped section and/or the second shaped section.

13. The medical device of claim 1, where the first shaped section comprises a shape selected from a circle, an arcuate shape, a partial circular shape, a loop, an oval, a square, a rectangle, a polygon, an overlapping loop, a pair of semi-circles, a flower shape, and a FIG. 8.

14. The medical device of claim 13, where the first shaped section is non-planar.

15. The medical device of claim 1, where the third shaped section comprises a shape selected from a circle, an arcuate shape, a partial circular shape, a loop, an oval, a square, a rectangle, a polygon, an overlapping loop, a pair of semi-circles, a flower, shape, and a FIG. 8.

16. The medical device of claim 15, where the third shaped section is non-planar.

17. The medical device of claim 1, where the individual subsets of wires in the second shaped section extend substantially normal to the first shaped section.

18. The medical device of claim 1, further comprising a capturing section formed by at least one wire diverging from the third shaped section.

19. The medical device of claim 18, where the capturing section comprises a shape selected from the group consisting of a basket, a filter, a bag, a coil, a helical wire structure, a mesh, a single wound wire, and a plurality of crossing wires.

20. The medical device of claim 1, where the individual subsets of wires each comprise a single wire.

21. The medical device of claim 1, where the individual subsets of wires each comprise a bundle of smaller wires.

22. The medical device of claim 1, where the wires have a cross-sectional shape selected from the group consisting of a circle, an oval, a:

rectangular shape, and a D-shape.

23. The medical device of claim 1, where the plurality of wires in the main bundle are braided.

24. The medical device of claim 1, where the plurality of wires in the main bundle are wound.

25. The medical device of claim 1, where the first shape section is rotatable relative to the third shape section, such that upon rotation the second shape forms a mesh or helical structure.

26. The medical device of claim 1, where at least one of the wires diverging from the main bundle returns to the main bundle after forming at least one of the shaped sections in the device.

27. The medical device of claim 1, where each of the wires diverging from the main bundle returns to the main bundle after forming at least one of the shaped sections in the device.

28. The medical device of claim 1, where the first shaped section and third shaped sections forms a connector shapes and the second shaped section forms a traversing section.

29. The medical device of claim 1, where each shaped section is jointless.

30. The medical device of claim 1, where each transition between each shaped section is jointless.

38. The intravascular apparatus of claim 31, where the second shape is non-planar.

39. The intravascular apparatus of claim 31, where the second shape comprises a shape selected from the group consisting of a circle, an arcuate shape, a partial circular shape, a loop, an oval, a square, a rectangle, a polygon, an overlapping loop, a pair of semi-circles, a flower shape, and a figure 8.

31. An intravascular apparatus for deployment in a vessel comprising:

a plurality of wires grouped into a main bundle, where at least a first portion of the plurality of wires diverge from the main bundle to form a first shape;

a plurality of subsets of wires diverging from the first shape and extending normally from the first shape;

a second shape formed by the convergence of the plurality of subsets of wires;

where the first shape has a first expanded profile when unconstrained, such that on deployment in the vessel the first shape expands towards the first expanded profile;

where the second shape is collapsible to fit within the microcatheter and has a second expanded profile when unconstrained, such that on deployment in the vessel the second shape expands towards the second expanded profile; and

where the plurality of subsets of wires extending between the first and second shapes, and are spaced apart such that spacing the first and second shapes causes the plurality of subsets to move towards a wall of the vessel.

32. The intravascular apparatus of claim 31, where a second portion of the main bundle diverges from the main bundle separately from the first portion to form the first shape.

33. The intravascular apparatus of claim 31, where a second portion of the main bundle diverges from the main bundle separately from the first portion to form a third shape.

34. The intravascular apparatus of claim 31, where each shaped section is jointless.

35. The intravascular apparatus of claim 31, where each transition between each shape is jointless.

36. The intravascular apparatus of claim 31, where the first shape comprises a shape selected from the group consisting of a circle, an arcuate shape, a partial circular shape, a loop, an oval, a square, a rectangle, a polygon, an overlapping loop, a pair of semi-circles, a flower shape, and a FIG. 8.

37. The intravascular apparatus of claim 31, where the first shape is non-planar.

40. The intravascular apparatus of claim 31, where the second shape comprises a shape selected from a group consisting of a basket, a filter, a bag, a coil, a helical wire structure, a mesh, a braided wire, and a plurality of crossing wires.

41. The intravascular apparatus of claim 31, further comprising a capturing section formed by at least one wire diverging from the second shaped section.

42. The intravascular apparatus of claim 41, where the capturing section comprises a shape selected from the group consisting of a basket, a filter, a bag, a coil, a helical wire structure, a mesh, a single wound wire, and a plurality of crossing wires.

43. The intravascular apparatus of claim 31, where the main bundle extends for a length sufficient to withdraw the device from a body of a patient.

44. The intravascular apparatus of claim 31, where the plurality of wires includes at least a first wire and a second wire where the first and second wire each has different characteristics.

45. The intravascular apparatus of claim 44, where the characteristics are selected from a group consisting of material, cross-sectional shape, and cross-sectional size

46. The intravascular apparatus of claim 44, where the characteristics are selected from a group consisting of brittleness, ductility, elasticity, hardness, malleability, plasticity, strength, and toughness.

47. The intravascular apparatus of claim 31, where the group of wires includes at least one shape memory alloy wire.

48. The intravascular apparatus of claim 31, where the group of wires includes at least one super-elastic wire.

49. The intravascular apparatus of claim 31, where the group of wires includes at least one polymeric wire.

50. The intravascular apparatus of claim 31, where the group of wires includes at least one wire comprising a metal alloy.

51. The intravascular apparatus of claim 50, where the metal alloy comprises an alloy selected from the group consisting of stainless steel, titanium, platinum, gold, iridium, tantalum, and nitinol.

52. The intravascular apparatus of claim 31, further comprising at least one radiopaque material located on the first shaped section and/or the second shaped section.

53. The intravascular apparatus of claim 31, where at least one wire comprises a shape selected from the group consisting of a circle, an oval, a rectangular shape, and a D-shape.

54. The intravascular apparatus of claim 31, where the plurality of wires in the main bundle are braided.

55. The intravascular apparatus of claim 31, where the plurality of wires in the main bundle are wound.

56. The intravascular apparatus of claim 31, where the first shape is rotatable relative to the second shape, such that upon rotation the subsets of wires form a mesh or helical pattern.

57. The intravascular apparatus of claim 31, where at least one of the wires diverging from the main bundle returns to the main bundle after forming at least one of the shapes in the device.

58. The intravascular apparatus of claim 31, where each of the wires diverging from the main bundle returns to the main bundle after forming at least one of the shapes in the device.

59-93. -93. (canceled)