Thrombus retrieval stents and methods of using for treatment of ischemic stroke
AssigneeMG Stroke Analytics Inc.
InventorMayank GOYAL
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Abstract
Methods and apparatus for retrieving a blood clot are disclosed. The apparatus comprises an expandable wire frame for deployment using a push wire within a microcatheter. When deployed in the vicinity of a blood clot, the wire frame is configured to expand and trap the blood clot allowing the blood clot to be removed. The expandable wire frame is connected to the push wire at distal and proximal ends. One or more expansion stops define a minimum distance between the distal and proximal ends of the expandable wire frame and a point of maximum extension of the expandable wire frame. This may help the user to control the configuration of the apparatus as it is being used within the vascular system.
Claims12
A blood clot retrieving apparatus for deployment into a patient's vasculature from a catheter and for retrieving an intravascular blood clot from within the patient's vasculature comprising:
- a push wire;
- an expandable wire frame operatively connected to the push wire adjacent a distal end of the push wire, the expandable wire frame having a plurality of expandable wires having distal and proximal ends operatively connected to the push wire, the expandable wire frame expandable from a compressed position within the catheter to an uncompressed deployed position;
- at least one expansion stop fixed to the push wire, the expansion stop positioned on the push wire to define a minimum distance between the distal and proximal ends of the expandable wire frame and a point of maximum extension of the expandable wire frame.
A method of using a blood clot retrieving apparatus comprising:
- expanding an expandable wire frame operatively connected to a push wire, wherein the expandable wire frame has a plurality of expandable wires having proximal and distal ends operatively connected to the push wire;
- applying a force to at least one of the first and second ends to control the axial length between the proximal and distal ends of the expandable wire frame to thereby control the stiffness of the expanded wire frame.
Dependencies are inferred from the claim text.