Vascular expandable devices

Patent metadata

Field	Value
Publication number	US-11065009-B2
Application number	US-201815892284-A
Country	US
Kind code	B2
Filing date	Feb 8, 2018
Priority date	Feb 8, 2018
Publication date	Jul 20, 2021
Grant date	Jul 20, 2021

Abstract

Vascular expandable devices and associated methods are disclosed herein. An expandable vascular device can include a generally tubular sidewall formed of a plurality of braided strands. The device can have a compressed state for delivery in which the device has a compressed state diameter of 0.027 inches or less. The device can have an expanded state in which the device has an expanded state diameter. A full expansion distance of the device corresponds to a longitudinal unconstrained distance at which the distal end of the expandable device attains the expanded state diameter. The full expansion distance can be 20 mm or less.

First claim

We claim:

1. A system comprising:
a delivery catheter; and
an expandable device implantable across an aneurysm in a cerebral blood vessel of a patient, the expandable device comprising:
a generally tubular sidewall formed of a plurality of braided strands, at least some of the strands having a cross-sectional diameter of less than 0.001 inches, wherein the sidewall has a number of pores between the strands, and the pores are sized to have a flow-diversion effect with respect to an aneurysm when the sidewall extends across the aneurysm;
a compressed state in which the expandable device is positioned within the delivery catheter, the expandable device having a compressed state diameter of 0.027 inches or less, corresponding to an inside diameter of the delivery catheter; and
an expanded state in which the expandable device has an expanded state diameter and is at a full expansion distance of 14 mm or less, the full expansion distance corresponding to a longitudinal distance beyond a distal opening of the catheter at which the distal end of the expandable device attains the expanded state diameter,
wherein at least a portion of the expandable device remains within the delivery catheter at the full expansion distance.

2. The expandable device of claim 1 , wherein the full expansion distance is 5-14 mm.

3. The expandable device of claim 2 , wherein the expanded state diameter is 2 mm or more.

4. The expandable device of claim 2 , wherein the expanded state diameter is 2-6 mm.

5. The expandable device of claim 1 , wherein the compressed state diameter is 0.021 inches or less.

6. The expandable device of claim 1 , wherein the compressed state diameter is 0.017 inches or less.

7. The expandable device of claim 1 , wherein the compressed state diameter is 0.017-0.027 inches.

8. The expandable device of claim 1 , wherein the expanded state diameter is 2 mm or more.

9. The expandable device of claim 1 , wherein the expanded state diameter is 2-6 mm.

10. The expandable device of claim 1 , wherein the sidewall has a porosity measure that is sufficient to have a flow-diversion effect with respect to an aneurysm when the sidewall extends across the aneurysm.

11. The expandable device of claim 1 , wherein at least some of the strands have a cross-sectional diameter of 0.002 inches or less.

12. The expandable device of claim 1 , wherein at least some of the strands have a cross-sectional diameter of 0.0015 inches or less.

13. The expandable device of claim 1 , wherein at least some of the strands have a cross-sectional diameter of 0.0009 inches or less.

14. The expandable device of claim 1 , wherein at least some of the strands are metallic and have an oxide layer that is 400 angstroms or less in thickness.

15. The expandable device of claim 1 , wherein the expandable device is self-expandable to the expanded state diameter.

16. The expandable device of claim 15 , wherein the sidewall forms a tube having a proximal end and a distal end, the tube having a lumen defined by the sidewall, and openings at the proximal and distal ends of the tube.

17. The expandable device of claim 16 , wherein the lumen is non-filtering and open to flow of liquid therethrough.

18. The expandable device of claim 16 , wherein the sidewall consists of the braided strands.

19. The expandable device of claim 1 , wherein the strands collectively comprise a first metallic material and a second metallic material, and the second metallic material is more radiopaque than the first metallic material.

20. The expandable device of claim 19 , wherein the second metallic material comprises platinum or platinum alloy.

21. The expandable device of claim 1 , wherein the expanded state diameter is a diameter to which the expandable device will self-expand, and is 2.5%-12.5% below the expandable device's maximum unconstrained self-expansion diameter.

22. A system comprising:
a core assembly;
a tubular sheath; and
a generally tubular structure disposed on the core assembly, wherein the tubular structure is formed of a plurality of braided strands, at least some of the strands having a cross-sectional diameter of less than 0.001 inches, wherein the tubular structure has:
a number of pores between the strands, the pores being sized to have a flow-diversion effect with respect to cerebral aneurysm when the tubular structure extends across the aneurysm,
a compressed state when the tubular structure is positioned within the tubular sheath,
an expanded state in which the tubular structure has an expanded state diameter and is at a full expansion distance of 14 mm or less, the full expansion distance corresponding to a longitudinal unconstrained distance at which the distal end of the tubular structure attains the expanded state diameter,

wherein at least a portion of the tubular structure remains within the tubular sheath at the full expansion distance.

23. The system of claim 22 , wherein the core assembly and tubular structure are disposed in a lumen of the tubular sheath.

24. The system of claim 22 , wherein the tubular sheath is a first tubular sheath, and wherein the system further comprises a second tubular sheath.

25. The system of claim 22 , wherein the tubular structure has a compressed state diameter of 0.027 inches or less.

26. The system of claim 22 , wherein the full expansion distance is 5-14 mm.

Assignees

• Covidien Lp

Inventors

• Dawson Marc
• Barooni Agee
• Hamel Gregory M
• Huynh Anthony
• Jackson Brad

Classifications

• A61B17/12172 Primary

  having a pre-set deployed three-dimensional shape (methods of manufacturing A61B2017/00526) · CPC title

• A61F2/962

  having an outer sleeve · CPC title

• A61F2/90

  characterised by a net-like or mesh-like structure · CPC title

• A61B17/12113

  within an aneurysm · CPC title

• A61F2002/823

  Stents, different from stent-grafts, adapted to cover an aneurysm · CPC title