Thrombectomy devices and methods
AssigneeRazack Intellectual Properties, LLC
InventorNasser RAZACK
Life of this patent
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Abstract
Thrombectomy apparatuses including multiple regions arranged to ensnare and stabilize a thrombus for removal from a blood vessel. Different regions of the apparatus can expand with different radial forces to improve engagement and retention of the thrombus. Different regions of the apparatus can have different diameters for encompassing the clot and for conforming to different portions of a blood vessel. Different regions of the apparatus can have a higher mesh density for capturing or retaining break away material of the clot. A junction region between the different regions of the apparatus can be arranged to enhance expansion and contraction of the apparatus.
Claims20
A thrombectomy apparatus comprising:
- a clot engagement region comprising a first region of a plurality of struts and configured to expand with a first radial force;
- a tapered distal capture region comprising a porous region at a distal end of the clot engagement region, wherein the plurality of struts are continuous with the porous region, further wherein the tapered distal capture region is configured to expand radially with a second radial force, and wherein pores of the porous region are smaller than gaps between the struts of the clot engagement region;
- and
- a distal microwire extending from the tapered distal capture region by between 0.5 cm and 10 cm.
A method of removing a clot from a blood vessel, the method comprising:
- passing a thrombectomy apparatus in a collapsed and constrained state through the clot within the blood vessel, wherein the thrombectomy apparatus comprises:
- a clot engagement region comprising a plurality of struts wherein the clot, a tapered distal capture region comprising a porous region at a distal end of the clot engagement region, wherein the plurality of struts are continuous with the porous region, and wherein pores of the porous region are smaller than gaps between the struts of the clot engagement region, and a distal microwire extending from the tapered distal capture region by between 0.5 cm and 10 cm;
- and
- expanding the clot engagement region within the blood vessel with a first radial expansion force and expanding the tapered distal capture region within the blood vessel with a second radial expansion force, so that the clot engagement region expands through the clot, wherein the clot engagement region expands with a greater radial expansion force than the tapered distal capture region.
Dependencies are inferred from the claim text.