Thrombus removal and intravascular distal embolic protection device

摘要

A clot extraction catheter comprises an expandable tubular mesh, a tapered tip fixed to the tubular mesh distal end, a self-expanding rim attached to the tubular mesh proximal end, at least three control wires, an inner sheath, and an outer sheath advancable over the inner sheath. To extract a clot, the catheter is advanced through the clot. The inner sheath is retracted relative to the control wires and the tubular mesh, allowing the rim and the tubular mesh to expand. The tubular mesh is retracted to capture the clot, closed once the clot is captured, constrained proximally by the distal portion of the inner sheath, and retracted with the inner sheath into the outer sheath. The control wires may be manipulated to control the angle of the rim relative to the longitudinal axis of the sheaths, facilitating clot capture and retraction of the tubular mesh into the sheaths thereafter.

主权项

1. A clot extraction catheter comprising:
an expandable tubular mesh having a distal end and a proximal end, the tubular mesh having an expanded configuration and a constrained configuration; a tapered tip fixed to the distal end of the expandable tubular mesh; a self-expanding ring attached to the proximal end of the expandable tubular mesh, the self-expanding ring having an unconstrained diameter which is greater than a width of the proximal end of the tapered tip; at least three control wires attached to the self-expanding ring; an inner sheath advancable over the at least three control wires to constrain at least a portion of the self-expanding ring and at least a portion of the tubular mesh within a lumen of the inner sheath, wherein the at least three control wires can be manipulated to control the angle of the self-expanding ring relative to an axis of the inner sheath when the self-expanding ring is unconstrained.