METHOD AND APPARATUS FOR ALLOWING BLOOD FLOW THROUGH AN OCCLUDED VESSEL

• US 20120089216A1
• Filed: 06/15/2010
• Published: 04/12/2012
• Est. Priority Date: 06/15/2009
• Status: Active Grant

• Current Assignee: Perflow Medical Ltd.
• Original Assignee: Perflow Medical Ltd.
• Inventors: Rapaport, Avraham, Cibulski, Gilad
• Granted Patent: US 9,510,855 B2
• Time in Patent Office: Days
• US Class Current: 623/1.11
• CPC Class Codes: A61B 17/221 Gripping devices in the form of loops or baskets for gripping calculi or similar types of obstructions surgical snare instruments A61B17/32056
• CPC Class Codes: A61B 17/320725 with radially expandable cutting or abrading elements A61B17/32075 takes precedence
• CPC Class Codes: A61B 2017/00893 pharmaceutically effective
• CPC Class Codes: A61B 2017/22034 for gripping the obstruction or the tissue part from inside
• CPC Class Codes: A61B 2017/2215 having an open distal end
• CPC Class Codes: A61B 90/39 Markers, e.g. radio-opaque or breast lesions markers
• CPC Class Codes: A61F 2/01 Filters implantable into blood vessels
• CPC Class Codes: A61F 2/844 folded prior to deployment
• CPC Class Codes: A61F 2/86 Stents in a form characterised by the wire-like elements; Stents in the form characterised by a net-like or mesh-like structure
• CPC Class Codes: A61F 2/88 the wire-like elements formed as helical or spiral coils forming a net-like or mesh-like structure A61F2/90
• CPC Class Codes: A61F 2220/005 using adhesives
• CPC Class Codes: A61F 2220/0058 soldered or brazed or welded
• CPC Class Codes: A61F 2220/0075 sutured, ligatured or stitched, retained or tied with a rope, string, thread, wire or cable
• CPC Class Codes: A61F 2230/0078 hyperboloidal
• CPC Class Codes: A61F 2250/0059 temporary
• CPC Class Codes: A61F 2250/0098 radio-opaque, e.g. radio-opaque markers
• CPC Class Codes: A61M 29/02 Dilators made of swellable material balloon catheters for angioplasty A61M25/104

Abstract

A device arranged to sustain and/or provide at least partial patency of a small blood vessel exhibiting an occlusion, the device constituted of a tubular body expandable from a first small diameter state for manipulation to, and through, the occlusion of the small blood vessel and a second large diameter state, the inner dimensions of the second large diameter state being no more than 50% of the diameter of the small blood vessel at the occlusion location, the device presenting a conduit for blood flow through the occlusion when in the large diameter state. In one embodiment the small blood vessel is an intracranial blood vessel.

Claims

1. A device arranged to sustain at least partial patency of a small blood vessel exhibiting an occlusion, the device comprising a tubular body exhibiting a first small diameter state for manipulation to, and through, the occlusion of the small blood vessel, the device expandable to a second large diameter state within the occlusion, the inner dimensions of said second large diameter state being no more than 50% of the diameter of the small blood vessel at the occlusion location, said device presenting a conduit through the tubular body for blood flow through the occlusion when in said large diameter state.

2. The device according to claim 1, wherein the tubular body in said second large diameter state does not urge to expand beyond 50% of the diameter of the small blood vessel.

3. The device according to claim 1, wherein the tubular body in the second large diameter state exhibits a length at least 14 times the inner diameter of the tubular body in the second large diameter state.

4. The device according to claim 1, wherein the tubular body in the second large diameter state exhibits an inner diameter no more than twice the inner diameter of the tubular body in the first small diameter state.

5. The device according to claim 1, further comprising a distal filtering extension coupled to a first end of said tubular body.

6. The device according to claim 5, wherein the distal filtering extension is arranged to expand to meet the inner wall of the small blood vessel distal of said occlusion.

7. The device according to claim 5, further comprising a proximal securing member coupled to a second end of said tubular body, opposing said first end, said second securing portion arranged to expand to meet the inner wall of the small blood vessel.

8. The device according to claim 1, further comprising a retraction mechanism arranged to collapse the device from the second large diameter state within the occlusion, wherein the device may be withdrawn.

9. The device according to claim 1, wherein the device is coated with an elastic non-porous material.

10. The device according to claim 1, wherein the device is constituted of self expanding braided filaments.

11. The device according to claim 1, further comprising a clot retrieval device arranged to retrieve at least a portion of the occlusion, said clot retrieval device in communication with said tubular body and exhibiting a diameter greater than 50% of the diameter of the small blood vessel at the occlusion location.

12. The device according to claim 1, wherein the tubular body is coated with an elastic porous material.

13. The device according to claim 1, wherein the small blood vessel is an intracranial blood vessel.

14. A temporary endovascular conduit system arranged to sustain partial patency of a small blood vessel exhibiting an occlusion, the temporary endovascular conduit system comprising:

a catheter exhibiting an inside diameter;

a device comprising a tubular body exhibiting a first small diameter state exhibiting an inner diameter less than said catheter inside diameter, said device expandable to a second large diameter state when said device is within the occlusion, the inner diameter of said second large diameter state being no more than 50% of the diameter of the small blood vessel at the occlusion location,

said device presenting a conduit through the tubular body for blood flow through the occlusion when in said second large diameter state.

15. The temporary endovascular conduit system according to claim 14, wherein the tubular body in said second large diameter state does not urge to expand beyond 50% of the diameter of the small blood vessel at the occlusion location.

16. The temporary endovascular conduit system according to claim 14, wherein the tubular body in the second large diameter state exhibits a length at least 14 times the inner diameter of the tubular body in the second large diameter state.

17. The temporary endovascular conduit system according to claim 14, wherein the tubular body in the second large diameter state exhibits an inner diameter no more than twice the inner diameter of the tubular body in the first small diameter state.

18. The temporary endovascular conduit system according to claim 14, wherein the device further comprises a distal filtering extension member coupled to a first end of the tubular body.

19. The temporary endovascular conduit system according to claim 18, wherein the distal filtering extension member is arranged to expand to meet the inner wall of the small blood vessel distal of said occlusion.

20. The temporary endovascular conduit system according to claim 18, further comprising a proximal securing member coupled to a second end of the tubular body, opposing said first end, said proximal securing member arranged to expand to meet the inner wall of the small blood vessel.

21. The temporary endovascular conduit system according to claim 14, further comprising a pair of members in communication with said device, said device collapsible from the second large diameter state to the first small diameter state responsive to respective motion of said members.

22. The temporary endovascular conduit system according to claim 14, wherein the tubular body is coated with an elastic non-porous material.

23. The temporary endovascular conduit system according to claim 14, wherein the tubular body is coated with an elastic porous material.

24. The temporary endovascular conduit system according to claim 14, wherein said device is constituted of self expanding braided filaments.

25. The temporary endovascular conduit system according to claim 14, further comprising a clot retrieval device arranged to retrieve at least a portion of the occlusion, said clot retrieval device in communication with said tubular body and exhibiting a diameter greater than 50% of the diameter of the small blood vessel at the occlusion location.

26. The temporary endovascular conduit system according to claim 14, wherein the small blood vessel is an intracranial blood vessel.

27. The temporary endovascular conduit system according to claim 14, further comprising a member in communication with said device, said device collapsible from the second large diameter state to the first small diameter state responsive to pulling of said member.

28. A system for restoring partial patency to a small blood vessel having an inner diameter and an occlusion, the system comprising:

a delivery catheter including a shaft having a shaft diameter and a recess adjacent a distal end of said shaft; and

a hollow meshed tube deliverable into said small blood vessel and across the occlusion by said delivery catheter when retained in said recess and expandable from a first small diameter that is substantially similar to or less than said shaft diameter to a second large diameter that is substantially smaller than said small blood vessel diameter;

wherein said hollow mesh tube is selectively expandable to said second large diameter in the occlusion thereby disassociated from said recess and deployed to sustain a dimension of a passage traveling through said clogged portion previously created by said delivery catheter.

29. A system for restoring partial patency according to claim 28, wherein said second large diameter is no more than 200% of said first small diameter.

30. A system for restoring partial patency according to claim 28, wherein said second larger diameter is no more than 50% of said small blood vessel diameter at the occlusion.