INTRAVASCULAR THROMBOEMBOLECTOMY DEVICE COMPRISING A PLURALITY OF CLOT ENGAGING ELEMENTS AND METHOD USING THE SAME

• US 20150250497A1
• Filed: 03/04/2015
• Published: 09/10/2015
• Est. Priority Date: 03/04/2014
• Status: Active Grant

• Current Assignee: Scientia Vascular, LLC
• Original Assignee: Likemark Medical, Inc
• Inventors: Marks, Michael P., Que, Like
• Granted Patent: US 10,271,863 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 2017/2212 having a closed distal end, e.g. a loop
• CPC Class Codes: A61B 2017/2215 having an open distal end

Abstract

A device and a method for increasing or restoring a flow in a body lumen are provided. The device and the method may treat conditions like a stroke by removing a clot from a blood vessel and/or reopen the vessel. The device may have a plurality of engaging elements, wires that can link at least two engaging elements, a central wire, and proximal control element. The positions of the engaging elements and the distance there between can be adjusted to ensure the engagement of the clot or occlusion.

Claims

1. A device for use in a body lumen comprising:

a central wire comprising a proximal end and a distal end thereof;

a plurality of engaging elements comprising a distal engaging element, a proximal engaging element, and one or more middle engaging element, each of the plurality of the engaging elements being associated with the central wire;

wherein each of the plurality of engaging elements comprises a distal end and a proximal end thereof;

the distal engaging element is most distally located among the plurality of the engaging elements and fixed to a distal tip of the central wire;

the proximal engaging element is most proximally located among the plurality of the engaging elements; and

the one or more middle engaging element is located between the distal and proximal engaging elements;

a flexible connection wire that associates with the proximal engaging element and at least one more engaging element, said connection wire configured to space the associated engaging elements apart at a distance; and

a proximal end control element that is located proximal to the proximal engaging element, wherein the proximal end of the proximal engaging element is fixed at the proximal end control element.

2. The device according to claim 1, wherein the proximal end control element comprises a tubing compartment comprising a distal end and a proximal end thereof, and the proximal end of the proximal engaging element is fixed at about the distal end of the tubing compartment.

3. The device according to claim 1, wherein the proximal end control element comprises a control wire comprising a distal end and a proximal end thereof, and the proximal end of the proximal engaging element is fixed at about the distal end of the control wire.

4. The device according to claim 1, wherein the proximal end control element comprises a wire comprising a distal end and a proximal end thereof, a distal segment of the wire is flexible serving as a connection wire, and all of the engaging elements are fixed to the connection wire.

5. The device according to claim 1, wherein at least one of the plurality of engaging elements comprises a plurality of wires or struts.

6. The device according to claim 1, wherein the flexible connection wire associates with each of the plurality of the engaging elements at a pre-set distance.

7. The device according to claim 1, wherein at least one of the plurality of engaging elements is self-expandable.

19. A method of removing at least part of an occlusion from a first location in a body lumen comprising:

introducing the device according to claim 1 into the body lumen;

locating the device at about the first location;

engaging at least part of the occlusion with at least one of the plurality of the engaging elements; and

removing the engaged occlusion from the first location.

20. The method according to claim 19, wherein said engaging comprises:

adjusting the position of one or more of the plurality of the engaging elements by;

holding the proximal end control element while pulling the central wire to engage the occlusion between at least two engaging elements, and/or

holding the central wire while pushing the proximal end control element to engage the occlusion between at least two of the engaging elements.

8. A device for use in a body lumen comprising:

a central wire comprising a proximal end and a distal end thereof;

a plurality of engaging elements comprising at least two pairs engaging elements, each of the plurality of the engaging elements associated with the central wire;

wherein each pair of the engaging elements comprises a capture element and a receiving element, said capture element located distal to the receiving element in each pair;

a spacing wire that associates with the proximal element and the receiving element spacing the associated proximal element and the receiving element in each pair at a distance; and

a proximal end control element that is located proximal to all of the engaging elements, wherein the proximal end of the most proximal engaging element is fixed at the proximal end control element.

9. The device according to claim 8, wherein the engaging elements in each pair operate together as a retrieval unit.

10. The device according to claim 8, wherein the proximal end control element comprises a tubing compartment comprising a distal end and a proximal end thereof, and the proximal end of the most proximal engaging element and the spacing wire are fixed at about the distal end of the tubing compartment.

11. The device according to claim 8, wherein the proximal end control element comprises a control wire comprising a distal end and a proximal end thereof, and the proximal end of the most proximal engaging element is fixed at about the distal end of the control wire.

12. The device according to claim 8, wherein the proximal end control element is a wire comprising a distal end and a proximal end thereof, a distal segment of the wire is flexible serving as a spacing wire, and all of the receiving elements are fixed to the spacing wire.

13. The device according to claim 8, wherein at least one of the plurality of engaging elements comprises a plurality of wires or struts.

14. The device according to claim 8, wherein at least one of the plurality of engaging elements is self-expandable.

21. A method of removing at least part of an occlusion from a first location in a body lumen comprising:

introducing the device according to claim 8 into the body lumen;

locating the device at about the first location;

engaging the at least part of the occlusion with at least one of the plurality of the engaging elements; and

removing the engaged occlusion from the first location.

22. The method according to claim 21, wherein said engaging comprises:

adjusting the position of the receiving elements and or the capture elements by;

holding the proximal end control element while pulling the central wire to engage the occlusion between at least one pair of the engaging unit, and/or;

holding the central wire while pushing the proximal end control element to engage the occlusion between at least one pair of the engaging unit.

15. A device for use in a body lumen comprising:

a central wire comprising a proximal end and a distal end thereof;

a plurality of engaging elements comprising at least two pairs of the engaging elements, each of the plurality of the engaging elements being associated with the central wire;

wherein each pair of the engaging elements comprises a capture element and a receiving element, said capture element located distal to the receiving element in each pair;

a spacing wire that associates with the proximal element and the receiving element spacing the associated proximal element and the receiving element in each pair at a distance;

wherein, one or more of the receiving element is fixed to the spacing wire with a tubing connector that can freely slide on the central wire.

16. The device according to claim 15, wherein the device further comprises a connection wire that is fixed between the capture element and the receiving element of each pair of engaging elements.

17. The device according to claim 15, wherein at least one of the plurality of engaging elements comprises a plurality of wires or struts.

18. The device according to claim 15, wherein at least one of the plurality of engaging elements is self-expandable.

23. A method of removing at least part of an occlusion from a first location in a body lumen comprising:

introducing the device according to claim 15 into the body lumen;

locating the device at about the first location;

engaging the at least part of the occlusion with at least one of the plurality of the engaging elements; and

removing the engaged occlusion from the first location.

24. The method according to claim 23, wherein said engaging comprises:

adjusting a position of the capture element by pulling the central wire until at least a part of clot is engaged between at least one pair of the engaging unit.