Implantable intraluminal device and method of using same in treating aneurysms

• US 7,942,925 B2
• Filed: 07/02/2009
• Issued: 05/17/2011
• Est. Priority Date: 07/09/2001
• Status: Active Grant

• Current Assignee: Stryker Corporation
• Original Assignee: Surpass Medical Ltd. (Stryker Corporation)
• Inventors: Nishri, Boaz, Grad, Ygael, Lieber, Baruch B., Yodfat, Ofer
• Primary Examiner(s): GHERBI, SUZETTE JAIME J
• Application Number:
  US12/496,672
• Publication Number:
  US 20090270970A1
• Time in Patent Office: 684 Days
• Field of Search: 623 135- 139, 623 111- 115
• US Class Current: 623/1.39
• CPC Class Codes: A61F 2/07 Stent-grafts
• CPC Class Codes: A61F 2/82 Devices providing patency to, or preventing collapsing of, tubular structures of the body, e.g. stents stent-grafts for tubular structures of the body other than blood vessels A61F2/04; stent-grafts for blood vessels A61F2/07; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95; for closing wounds, or holding wounds closed A61B17/04 - A61B17/115; dilators A61M29/00
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2002/065 Y-shaped blood vessels
• CPC Class Codes: A61F 2002/068 Modifying the blood flow model, e.g. by diffuser or deflector
• CPC Class Codes: A61F 2002/821 Ostial stents
• CPC Class Codes: A61F 2002/823 Stents, different from stent-grafts, adapted to cover an aneurysm
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: Y10S 623/909 Method or apparatus for assembling prosthetic

Abstract

A method and apparatus for reducing blood flow to an aneurysm proximate to a bifurcation having a source blood vessel a first branch vessel and a second branch vessel, the method comprising: providing a first mesh-like tube of bio-compatible material, the first mesh-like tube exhibiting a porosity index pre-selected to skew blood flow about the bifurcation away from the aneurysm; inserting the first mesh-like tube into the source blood vessel and the first branch vessel; and securing the first mesh-like tube to at least one of the source blood vessel and the first branch vessel, whereby blood flowing from the source blood vessel flows without undue impedance to the first branch vessel and the second branch vessel while being skewed away from the aneurysm.

Claims

1. An intraluminal device implantable in a blood vessel having an aneurysm, comprising:

a braided mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is larger than the diameter of the blood vessel in which it is to be implanted, and having a length sufficient to be anchored at both ends to said blood vessel and to straddle said aneurysm;

said braided mesh-like tube being constituted of 24-144 filaments, and being designed to have in its implanted condition a porosity index of 60-75% and windows having an inscribed diameter of 50-320 μ

m, so as to skew the flow of blood away from the aneurysm sufficiently to decrease the possibility of rupture of said aneurysm.

2. The intraluminal device according to claim 1, wherein each of said filaments has a circular cross-section having a diameter of 10-50 μ

m.

3. The intraluminal device according to claim 1, wherein said braided mesh-like tube is formed of 62-120 filaments of bio-compatible material.

4. The intraluminal device according to claim 1, wherein said braided mesh like tube is constituted of a single tubular mesh.

5. The intraluminal device according to claim 1, wherein said braided mesh-like tube is constituted of multiple tubular meshes, lying one above the other in layer-like formations, in the implanted condition of the braided mesh-like tube.

6. A method of treating an aneurysm in a blood vessel, comprising:

implanting in the blood vessel a braided mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is larger than the diameter of the blood vessel in which it is to be implanted, and having a length sufficient to be anchored at both ends to said blood vessel and to straddle said aneurysm;

said braided mesh-like tube being constituted of 24-144 filaments, and being designed to have in its implanted condition a porosity index of 60-75% and windows having an inscribed diameter of 50-320 μ

m, so as to skew the flow of blood away from the aneurysm sufficiently to decrease the possibility of rupture of said aneurysm.

7. The method according to claim 6, wherein each of said filaments has a circular cross-section has a diameter of 10-50 μ

m.

8. The method according to claim 6, wherein said braided mesh-like tube is formed of 62-120 filaments of bio-compatible material.

9. The method according to claim 6, wherein said braided mesh-like tube is constituted of a single tubular mesh.

10. The method according to claim 6, wherein said braided mesh-like tube is constituted of multiple tubular meshes, lying one above the other in layer-like formations, in the implanted condition of the braided mesh-like tube.

11. An assembly for implanting an intraluminal device in a selected site of a blood vessel having an aneurysm, the assembly comprising:

an intraluminal device, which comprises a braided mesh-like tube of bio-compatible material having an expanded condition in which the tube diameter is larger than the diameter of the blood vessel in which it is to be implanted, and having a length sufficient to be anchored at both ends to said blood vessel and to straddle said aneurysm;

said braided mesh-like tube being constituted of 24-144 filaments, and being designed to have in its implanted condition a porosity index of 60-75% and windows having an inscribed diameter of 50-320 μ

m, so as to skew the flow of blood away from the aneurysm sufficiently to decrease the possibility of rupture of said aneurysm; and

a microcatheter for delivering said intraluminal device to said selected site in the blood vessel and for implanting it therein.

12. The assembly according to claim 11, wherein each of said filaments has a circular cross-section having a diameter of 10-50 μ

m.

13. The assembly according to claim 11, wherein said braided mesh-like tube is formed of 62-120 filaments of bio-compatible material.

14. The assembly according to claim 11, wherein said braided mesh-like tube is constituted of a single tubular mesh.

15. The assembly according to claim 11, wherein said braided mesh-like tube is constituted of multiple tubular meshes, lying one above the other in layer-like formations, in the implanted condition of the braided mesh-like tube.