FLEXIBLE VASCULAR OCCLUDING DEVICE

• US 20060206201A1
• Filed: 05/24/2006
• Published: 09/14/2006
• Est. Priority Date: 05/25/2004
• Status: Active Grant

• Current Assignee: Covidien LP (Medtronic Plc)
• Original Assignee: Chestnut Medical Technologies, Inc. (Medtronic Plc)
• Inventors: Garcia, Adrian, Ye, Ting Tina, Tran, Quang Q., Berez, Aaron L.
• Granted Patent: US 8,617,234 B2
• Time in Patent Office: Days
• US Class Current: 623/1.510
• CPC Class Codes: A61B 17/12022 Occluding by internal devices, e.g. balloons or releasable wires plugging an opening in the wall of an organ A61B17/0057; occluders for the cervical canal A61F6/146; vas deferens occluders A61F6/20
• CPC Class Codes: A61B 17/12118 for positioning in conjunction with a stent
• CPC Class Codes: A61B 2017/1205 Introduction devices
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm

Abstract

A vascular occluding device for modifying blood flow in a vessel, while maintaining blood flow to the surrounding tissue. The occluding device includes a flexible, easily compressible and bendable occluding device that is particularly suited for treating aneurysms in the brain. The neurovascular occluding device can be deployed using a micro-catheter. The occluding device can be formed by braiding wires in a helical fashion and can have varying lattice densities along the length of the occluding device. The occluding device could also have different lattice densities for surfaces on the same radial plane.

Claims

1. A tubular-shaped device for positioning within a blood vessel for embolization of an aneurysm, the device including a plurality of strands of helically-wound material in a lattice structure, wherein the lattice structure of the device has one of a first lattice density in a first portion and a second lattice density in a second portion, the first lattice density and second lattice density being different and being based on input motion.

2. The device of claim 1 wherein the first lattice density is higher than the second lattice density and wherein flow of blood through the lattice structure at the first lattice density is lower than flow of blood through the lattice structure at the second lattice density.

3. The device of claim 1 wherein a first portion of the lattice structure has the first lattice density and a second portion of the lattice structure has the second lattice density.

4. The device of claim 3 wherein the first portion of the lattice structure has the first lattice density responsive to user input and the second portion of the lattice structure has the second lattice density responsive to user input.

5. The device of claim 3 wherein the first lattice density is higher than the second lattice density and wherein the first portion of the lattice structure overlies the aneurysm.

6. The device of claim 5 wherein the second portion of the lattice structure is separate from the aneurysm.

7. The device of claim 6 wherein the second portion of the lattice structure overlies a blood vessel lumen.

8. The device of claim 1 wherein the input motion comprises motion in a longitudinal direction relative to the device.

9. The device of claim 1 wherein the helically-wound material comprises ribbons.

10. The device of claim 9 wherein the helically-wound material comprises less than 16 strands of ribbons.

11. The device of claim 9 wherein each ribbon has a different width.

12. The device of claim 9 wherein the device is radially compressible.

13. The device of claim 9 wherein the input motion changes the lattice density of the first portion of the occluding device only.

14. The device of claim 1 further comprising longitudinally extending areas of different densities.

15. The device of claim 14 wherein circumferential densities of the longitudinally extending areas vary based on the areas of different densities.

16. The device of claim 1 wherein the helically-wound material comprises a plurality of woven ribbons, each ribbon comprising an inner surface, an outer surface for positioning adjacent an inner wall of a vessel, the outer surface forming a portion of an outer circumference of the device between first and second ends of the device, and a plurality of openings extending between the inner and outer surface, the outer surface of the device comprising between about 20 to about 50 percent of the total circumferential area of the device.

17. The device of claim 1 wherein the lattice structure at the first lattice density restricts fluid flow there through in a direction at an angle to a length of the device and the lattice structure at the second lattice density permits greater fluid flow there through relative to the lattice structure at the first lattice density.

18. The device of claim 1 wherein the user input comprises an applied force at a portion of the device, the applied force causing a first lattice density at a first portion of the device and a second lattice density at a second portion of the device.

19. The device of claim 18 wherein the applied force comprises a rotation force.

20. The device of claim 1 further comprising changing at least one of the first lattice density and the second lattice density of the device based on a second user input.