Implantable stroke treating device

• US 6,673,089 B1
• Filed: 08/11/2000
• Issued: 01/06/2004
• Est. Priority Date: 03/11/1999
• Status: Expired due to Fees

• Current Assignee: Stryker European Operations Holdings, LLC (Stryker Corporation)
• Original Assignee: MindGuard Ltd.
• Inventors: Levin, Daniel, Yassour, Yuval, Yodfat, Ofer, Grad, Ygael, Rosenfeld, Moshe
• Primary Examiner(s): Lewis, Aaron J.
• Application Number:
  US09/637,287
• Time in Patent Office: 1,243 Days
• Field of Search: 606/1, 606/108, 606/198, 606/200, 623/1.1, 623/1.11, 623/1.12, 623/1.13, 623/1.39, 623/1.4
• US Class Current: 606/200
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/04 Hollow or tubular parts of organs, e.g. bladders, tracheae, bronchi or bile ducts A61F2/18, A61F2/20 take precedence; devices, other than stent-grafts, providing patency to, or preventing collapsing of, tubular structures of the body other than stent-grafts, e.g. stents A61F2/82; instruments specially adapted for placement or removal of stents or stent-grafts A61F2/95
• CPC Class Codes: A61F 2/856 Single tubular stent with a side portal passage
• CPC Class Codes: A61F 2/90 characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/954 for placing stents or stent-grafts in a bifurcation
• CPC Class Codes: A61F 2/958 Inflatable balloons for placing stents or stent-grafts
• CPC Class Codes: A61F 2002/018 made from tubes or sheets of material, e.g. by etching or laser-cutting
• 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 2230/0006 circular
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2250/0017 differing in yarn density
• CPC Class Codes: A61F 2250/0024 made from both porous and non-porous parts, e.g. adjacent parts

Abstract

An implantable device for positioning in the vicinity of the bifurcation of the common carotid artery (CCA) into the internal carotid artery (ICA) and the external carotid artery (ECA) comprises a deflecting element suitable to deflect the flow of embolic material flowing in the CCA toward the ICA, into the ECA.

Claims

1. A method for preventing the flow of embolic material flowing in the CCA from accessing the ICA, comprising deflecting the flow of said embolic material into the ECA.

2. A method according to claim 1, comprising implanting in the vicinity of the bifurcation of the common carotid artery (CCA) into the internal carotid artery (ICA) and the external carotid artery (ECA), a deflecting device comprising a deflecting element suitable to deflect the flow of embolic material flowing in the CCA toward the ICA, into the ECA.

3. A method for treating a patient suffering from, or suspected of suffering from, the generation of embolic material, comprising deflecting the flow of said embolic material into the ECA.

4. A method according to claim 3, wherein the deflecting device is provided in, or coupled to, a stent.

5. An intravascular device for implanting in a bifurcation of the common carotid artery (CCA) into the internal carotid artery (ICA) and the external carotid artery (ECA), comprising:

an implantable body configured and dimensioned for implanting in said bifurcation;

said implantable body including a deflecting portion sufficiently large to span said ICA at the bifurcation and having openings of a size to deflect, from said ICA to said ECA, embolic material in the blood flow from said CCA, while allowing blood flow from said CCA to said ICA;

wherein said deflecting portion comprises an array of wires extending adjacent said ICA, and wherein the wires have a thickness between 10-50 μ

.

6. An implantable device according to claim 5, wherein the Reynolds number for the wire is between 0 and 4, preferably 1 or less.

7. A device according to claim 5, wherein the deflecting portion comprises filtering means.

8. The device according to claim 5, wherein the size of the openings in said deflecting portion is such as to deflect, from said ICA to said ECA, particles in the range of 200 μ

m in size.

9. The device according to claim 5, wherein said implantable body is tubular in configuration, and said deflecting portion is an annular section of said tubular body extending for the complete circumference of said tubular implantable body.

10. The device according to claim 5, wherein said implantable body is tubular in configuration, and said deflecting portion is a section of said tubular body at one side, and extending for less than the complete circumference, of said tubular implantable body.

11. The device according to claim 5, wherein said implantable body is tubular in configuration and is configured and dimensioned for implanting within said ICA, and said deflecting portion extends across the end of said ICA at said bifurcation to deflect said embolic material to said ECA.

12. The device according to claim 5, wherein said implantable body is in a radially contracted state when introduced into said bifurcation, and is radially expandable to become anchored in the walls of said bifurcation when implanted therein.

13. The device according to claim 5, wherein said implantable body is configured and dimensioned to span said bifurcation between said CCA and said ECA, with said deflecting portion facing and spanning said ICA at said bifurcation.

14. The device according to claim 5, wherein said body includes radio-opaque markers for aiding in the intravascular positioning of the device.

15. The device according claim 5, wherein said implantable body is configured and dimensioned to have one end thereof positionable in the CCA and another end thereof positionable in the ECA.

16. An intravascular device for implanting in a bifurcation of the common carotid artery (CCA) into the internal carotid artery (ICA) and the external carotid artery (ECA), comprising:

an implantable body configured and dimensioned for implanting in said bifurcation;

said implantable body including a deflecting portion sufficiently large to span said ICA at the bifurcation and having openings of a size to deflect, from said ICA to said ECA, embolic material in the blood flow from said CCA, while allowing blood flow from said CCA to said ICA;

wherein said implantable body is tubular in configuration, and said deflecting portion is a section of said tubular body at one side, and extending for less than the complete circumference, of said tubular implantable body.

17. An intravascular device according to claim 16, wherein said deflecting portion comprises an array of wires extending adjacent said ICA, and wherein the wires have a thickness between 10-150μ

.

18. An implantable device according to claim 16, wherein the Reynolds number for the wire is between 0 and 4, preferably 1 or less.

19. The device according to claim 16, wherein the size of the openings in said deflecting portion is such as to deflect, from said ICA to said ECA, particles in the range of at least 200 μ

m in size.

20. The device according to claim 16, wherein said implantable body is tubular in configuration and is configured and dimensioned for implanting within said ICA, and said deflecting portion extends across the end of said ICA at said bifurcation to deflect said embolic material to said ECA.

21. The device according to claim 16, wherein said implantable body is in a radially contracted state when introduced into said bifurcation, and is radially expandable to become anchored in the walls of said bifurcation when implanted therein.

22. The device according to claim 16, wherein said implantable body is configured and dimensioned to span said bifurcation between said CCA and said ECA, with said deflecting portion facing and spanning said ICA at said bifurcation.

23. The device according to claim 16, wherein said body includes radio-opaque markers for aiding in the intravascular positioning of the device.

24. The device according claim 16, wherein said implantable body is configured and dimensioned to have one end thereof positionable in the CCA and another end thereof positionable in the ECA.