Intravascular thromboembolectomy device comprising a plurality of clot engaging elements and method using the same
First Claim
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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 elements, 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;
wherein the distal engaging element is most distally located among the plurality of the engaging elements and is fixed to a distal tip of the central wire;
wherein the proximal engaging element is most proximally located among the plurality of the engaging elements and can freely slide on the central wire; and
wherein the one or more middle engaging elements is located between the distal and proximal engaging elements and can freely slide on the central wire, each of the one or more middle engaging elements having an open distal end;
a flexible connection wire that associates with the proximal engaging element and at least one more engaging element of the plurality of engaging elements, said flexible connection wire configured to set the associated engaging elements apart at a pre-set 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;
wherein the device has an open state including spaces between each adjacent engaging element that are open the pre-set distance and a closed state including spaces between each adjacent engaging element shortened from the pre-set distance to a second distance; and
wherein pulling the control element proximally while holding the central wire causes the distance between the capture elements to increase until the connection wire is under tension, thereby setting the associated engaging elements apart at the pre-set distance.
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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.
45 Citations
17 Claims
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1. A device for use in a body lumen comprising:
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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 elements, 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; wherein the distal engaging element is most distally located among the plurality of the engaging elements and is fixed to a distal tip of the central wire; wherein the proximal engaging element is most proximally located among the plurality of the engaging elements and can freely slide on the central wire; and wherein the one or more middle engaging elements is located between the distal and proximal engaging elements and can freely slide on the central wire, each of the one or more middle engaging elements having an open distal end; a flexible connection wire that associates with the proximal engaging element and at least one more engaging element of the plurality of engaging elements, said flexible connection wire configured to set the associated engaging elements apart at a pre-set 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; wherein the device has an open state including spaces between each adjacent engaging element that are open the pre-set distance and a closed state including spaces between each adjacent engaging element shortened from the pre-set distance to a second distance; and wherein pulling the control element proximally while holding the central wire causes the distance between the capture elements to increase until the connection wire is under tension, thereby setting the associated engaging elements apart at the pre-set distance. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification