Shaped Removal Device

• US 20140046359A1
• Filed: 08/13/2013
• Published: 02/13/2014
• Est. Priority Date: 08/13/2012
• Status: Active Grant

• Current Assignee: Microvention Incorporated (Terumo Corporation)
• Original Assignee: Microvention Incorporated (Terumo Corporation)
• Inventors: Bowman, Heath, O'Leary, Shawn
• Granted Patent: US 9,770,251 B2
• Time in Patent Office: Days
• US Class Current: 606/200
• CPC Class Codes: A61B 17/22032 having inflatable gripping elements balloon catheters A61M25/10
• 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 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2212 having a closed distal end, e.g. a loop

Abstract

An obstruction removal device is described having a variable external profile shape comprising one or more smaller profile regions and one or more larger profile regions.

Claims

1. An obstruction removal device comprising:

a first tubular region;

a second tubular region connected to said first tubular region; and

,

a third tubular region connected to said second tubular region;

wherein said first tubular region and said third tubular region have a first diameter, and said second tubular region has a second diameter that is different from said first expanded diameter when said obstruction removal device is in an expanded state.

2. The obstruction removal device of claim 1, wherein said first diameter is larger than said second diameter.

3. The obstruction removal device of claim 2, wherein said second diameter is smaller than said first diameter.

4. The obstruction removal device of claim 3, wherein said first tubular region and said second tubular region are each composed of a plurality of rectangular cells and wherein said second tubular region is composed of a plurality of elliptical cells.

5. The obstruction removal device of claim 4, further comprising a fourth tubular region connected to said first tubular region and a fifth tubular region connected to said third tubular region;

wherein said fourth tubular region and said fifth tubular region both have said second expanded diameter.

6. The obstruction removal device of claim 5, wherein said fourth tubular region further comprises members that merge to a single point.

7. The obstruction removal device of claim 6, wherein said first tubular region and said third tubular region are composed of at least four rectangular cells each.

8. The obstruction removal device of claim 6, wherein said second tubular region, said fourth tubular region, and said fifth tubular region are each composed of two elliptical cells.

9. The obstruction removal device of claim 1, wherein said first tubular region and said second tubular region are each composed of a first plurality of cells and each form a closed tubular shape;

and wherein said second tubular region is composed of a second plurality of cells and form an open tubular shape.

10. An obstruction removal device, comprising:

a plurality of cells forming a first region, a second region, and a third region;

wherein said first and third region expand to a first profile size and wherein said second region expands to a second profile size, different from said first profile size.

11. The obstruction removal device of claim 10, wherein said first profile size is larger than said second profile size.

12. The obstruction removal device of claim 10, wherein said first profile size is smaller than said second profile size.

13. The obstruction removal device of claim 10, wherein said first and third region have a first cell pattern and said second region has a second cell pattern.

14. The obstruction removal device of claim 13, wherein said first cell pattern comprises a plurality of adjacent rectangular cells.

15. The obstruction removal device of claim 13, wherein said first cell pattern comprises a plurality of adjacent elliptical cells.

16. An obstruction removal device comprising:

a plurality of cells forming a pattern of tubular bands, said bands alternating between a first band comprising a plurality of adjacent, elliptical cells, and a second band comprising a plurality of adjacent, rectangular cells.

17. The obstruction removal device of claim 16, wherein said tubular bands the same expanded diameter.

18. The obstruction removal device of claim 16, wherein said first band has a first expanded diameter and said second band has a second expanded diameter.

19. A method of retrieving an obstruction, comprising:

deploying a distal end of a microcatheter near an obstruction in a vessel;

exposing an obstruction removal device carried in said microcatheter;

expanding a first region of said obstruction removal device to a first diameter and exposing a second region of said obstruction removal device to a second diameter, smaller than said first diameter;

engaging an obstruction with said obstruction removal device; and

,

withdrawing said obstruction removal device from said vessel.

20. An obstruction removal device comprising:

a first plurality of cells having a plurality of contact points contacting an interior of a vessel; and

a second plurality of cells connected to said first plurality of cells, and spaced apart from said interior of said vessel.

21. The obstruction removal device of claim 20, wherein said plurality of contact points is between 2 and 40 contact points.

22. The obstruction removal device of claim 20, wherein said plurality of contact points is 8 and said first plurality of cells and said second plurality of cells are 14.