Push wire for endoluminal medical device

Patent metadata

Field	Value
Publication number	US-11219744-B2
Application number	US-201715493327-A
Country	US
Kind code	B2
Filing date	Apr 21, 2017
Priority date	Apr 21, 2017
Publication date	Jan 11, 2022
Grant date	Jan 11, 2022

Abstract

An elongate body extending from a proximal end to a distal end includes a core comprising an amorphous metal alloy and includes a sheath that comprises a crystalline metallic material. The sheath surrounds the core.

First claim

We claim:

1. A push wire for an endoluminal medical device, comprising:
an elongate body extending from a proximal end to a distal end,
wherein the body includes (i) a cylindrical core comprising an amorphous metal alloy, and (ii) a sheath comprising a crystalline metallic material, wherein the sheath surrounds the core,
wherein the sheath provides sufficient stiffness to push the endoluminal device through a vessel of a patient, and
wherein the core imparts kink resistance and flexibility.

2. The push wire of claim 1 , wherein the body has a pushability of 50 gf or greater.

3. The push wire of claim 2 , wherein the body has a pushability of 100 gf or greater.

4. The push wire of claim 3 , wherein the body has a pushability of 200 gf or greater.

5. The push wire of claim 1 , wherein the body has a pushability per cross sectional area of 250,000 gf/in 2 or greater.

6. The push wire of claim 1 , wherein the body has a pushability per cross sectional area of 750,000 gf/in 2 or greater.

7. The device of claim 1 , wherein the core consists essentially of the amorphous metal alloy.

8. The device of claim 1 , wherein the amorphous metal alloy comprises an alloy comprising zirconium.

9. The device of claim 1 , wherein the crystalline metallic material comprises a crystalline metal alloy.

10. The device of claim 9 , wherein the crystalline metal alloy comprises stainless steel.

11. The device of claim 9 , wherein the crystalline metal alloy comprises titanium.

12. The device of claim 6 , further comprising a lubricous coating disposed on the sheath.

13. The device of claim 6 , wherein the coating comprises diamond-like carbon.

14. The device of claim 1 , wherein the sheath has a thickness of from about 0.2 mm to about 1 mm.

15. The device of claim 1 , wherein the body includes a distal portion, wherein the distal portion is tapered in proximity to the distal end.

16. The device of claim 15 , wherein the tapered portion of the distal portion has a length in a range of from 5 cm to 25 cm.

17. The device of claim 1 , wherein the body has a length of in a range from 50 cm to 200 cm.

18. An endoluminal delivery assembly comprising:
a push wire according to claim 1 ; and
a catheter comprising a first lumen configured to receive at least the distal portion of the body of the device according to claim 1 .

19. An endoluminal delivery assembly comprising:
a push wire according to claim 1 ; and
a catheter comprising a polymeric material to which at least a distal portion of the push wire is anchored.

20. The assembly of claim 19 , wherein the assembly is a percutaneous coronary intervention assembly.

21. The endoluminal delivery assembly of claim 18 , wherein the catheter further comprises a second lumen configured to receive a guidewire.

Assignees

• Medtronic Vascular Inc

Inventors

• Donegan Michael

Classifications

• A61L29/02

  Inorganic materials · CPC title

• A61M2025/1079

  having radio-opaque markers in the region of the balloon · CPC title

• A61M2025/09075

  having a core without a coil possibly combined with a sheath · CPC title

• A61M25/0102 Primary

  Insertion or introduction using an inner stiffening member, e.g. stylet or push-rod · CPC title

• A61M25/09

  Guide wires · CPC title