| CPC A61B 17/221 (2013.01) [A61B 2017/22001 (2013.01); A61B 2017/22045 (2013.01); A61B 2017/2212 (2013.01); A61B 2017/2217 (2013.01)] | 3 Claims |
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1. A clot removal device for removing a clot from a body vessel, the clot removal device delivered to the vessel via a catheter and comprising:
a microcatheter;
a pull wire; and
a stentriever comprising a proximal spiral section comprising a plurality of struts and a distal cylindrical body section, the proximal spiral section configured to pinch the clot between a distal end of the microcatheter and the proximal spiral section during distal advancement of the microcatheter or proximal retraction of the proximal spiral section and comprising at least a first portion detached from the pull wire, and the distal cylindrical body section configured to expand from a collapsed delivery configuration to a pinching configuration and an expanded configuration;
wherein a longitudinal axis of the proximal spiral section undulates relative to the pull wire;
wherein in the collapsed delivery configuration, the stentriever and pull wire are inside the catheter,
wherein in the pinching configuration the stentriever and a portion of the pull wire are outside the catheter and the distal cylindrical body section comprises a first diameter, and
wherein in the expanded configuration, a distal end of the catheter is configured to contact a proximal end of the clot,
wherein the pull wire is affixed to the stentriever proximate a distal end of the stentriever such that when the pull wire is retracted proximally in relation to the stentriever, the pull wire retracts the distal end of the stentriever proximally to move only the distal cylindrical body section to a second diameter while a proximal end of the distal cylindrical body section remains distal of the catheter, the second diameter being greater than the first diameter; and
wherein at least a second portion of the proximal spiral section encircles the pull wire.
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