Complex wire formed devices

• US 8,512,352 B2
• Filed: 04/17/2007
• Issued: 08/20/2013
• Est. Priority Date: 04/17/2007
• Status: Expired due to Fees

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Lazarus Effect, Inc. (Medtronic Plc)
• Inventors: Martin, Brian B.
• Primary Examiner(s): SEVERSON, RYAN J
• Application Number:
  US11/736,537
• Publication Number:
  US 20080262532A1
• Time in Patent Office: 2,317 Days
• Field of Search: 606/110, 606/113, 606/114, 606/127, 606/128, 606/200
• US Class Current: 606/127
• 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
• 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. An apparatus comprising:

a microcatheter having a size and flexibility to navigate within a neurovascular region of the patient;

a plurality of wires joined into a main bundle and extending from the microcatheter, 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;

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

where at least one wire diverges from the second shape to form a blood permeable filter member shape composing a mesh pattern;

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

where the plurality of subsets of wires extends between the first and second shapes, and are spaced apart on each respective shape such that spacing the first and second shapes causes the individual subsets to move towards a wall of a vessel in the neurovascular region;

where the blood permeable filter member shape is collapsible to fit within the microcatheter and expandable to expand in the neurovascular region upon deployment; and

where the second shape is configured to assume the expanded profile independently of the first shape.

2. The apparatus of claim 1, where a second portion of the plurality of wires diverges from the main bundle separately from the first portion to form the first shape.

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

4. The apparatus of claim 1, where each transition between each shape is jointless.

5. The apparatus of claim 1, where the first shape is non-planar.

6. The apparatus of claim 1, where the second shape is on-planar.

7. The apparatus of claim 1, 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 figure 8.

8. The apparatus of claim 1, 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.

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

10. The apparatus of claim 1, 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.

11. The apparatus of claim 1, where the characteristics are selected from a group consisting of material, cross-sectional shape, and cross-sectional size.

12. The apparatus of claim 10, where the characteristics are selected from a group consisting of brittleness, ductility, elasticity, hardness, malleability, plasticity, strength, and toughness.

13. The apparatus of claim 1, where the plurality of wires forming the main bundle comprises at least one shape memory alloy wire.

14. The apparatus of claim 1, where the plurality of wires forming the main bundle comprises at least one super-elastic wire.

15. The apparatus of claim 1, where the plurality of wires thrilling the main bundle comprises at least one polymeric wire.

16. The apparatus of claim 1, where the plurality of wires forming the main bundle comprises at least one wire comprising a metal alloy.

17. The apparatus of claim 16, where the metal alloy comprises an alloy selected from the group consisting of stainless steel, titanium, platinum, gold, iridium, tantalum, nitinol, and combinations thereof.

18. The medical device of claim 1, 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.

19. The apparatus of claim 1, further comprising at least one radiopaque material located on the first and/or second shape.

20. The apparatus of claim 1, where the plurality of wires in the main bundle are braided.

21. The apparatus of claim 1, where the plurality of wires in the main bundle are wound.

22. The apparatus of claim 1, where the first shape is rotatable relative to the second shape, such that upon rotation the subsets of wires form a mesh or (Original):

helical pattern.

23. The apparatus 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 shapes or blood permeable filter member in the device.

24. The apparatus 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 shapes or blood permeable filter member in the device.

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

a first main bundle comprised of a plurality of wires;

a first shape formed by a divergence of the plurality of wires into a plurality of individual first subsets of wires, and where each first subset of wires diverges to form a network of wires,

where the network of wires converges to harm a plurality of individual second subset of wires forming a second shape, and where each second subset of wires converges to form a second main bundle;

where a region of the device from the first shape to the second shape forms a basket structure having no joints where the basket structure comprises a mesh pattern; and

where the first and second shape each form a three dimensional structure and the first and second shape are each independently expandable.

26. The apparatus of claim 25, network of wires comprise individual single wires.

27. The apparatus of claim 25, 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 figure 8.

28. The apparatus of claim 25, 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, to rectangle, a polygon, an overlapping loop, a pair of semi-circles, a flower shape, and a figure 8.

29. The medical device of claim 25, where the first shape is rotatable relative to the second shape, such that upon rotation the network of individual wires forms a mesh or helical pattern.

30. The apparatus of claim 25, where each transition between each shape is jointless.

31. The apparatus of claim 25, where each individual single wire comprises a plurality of filaments.

32. The apparatus of claim 25, where the first main bundle and the second main bundle converge.

33. The apparatus of claim 25, where main bundle of wires includes at least a first wire and a second wire where the first and second wire each has different characteristics.

34. The apparatus of claim 33, where the characteristics are selected from a group consisting of material, cross-sectional shape, and cross-sectional size.

35. The apparatus of claim 33, where the characteristics are selected from a group consisting of brittleness, ductility, elasticity, hardness, malleability, plasticity, strength, and toughness.