Method of removing a vein filter
AssigneeRex Medical, L.P.
InventorsJames Erich Bressler, David M. Schaller, James F. McGuckin, JR.
Life of this patent
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Abstract
A method of removing an implanted vessel filter by a femoral approach comprising the steps of providing a catheter with a curved tip, inserting a straightening device into the catheter to move the catheter tip from a curved position to a more straightened position, advancing the catheter tip through the femoral vein and past a cranial end of the filter, withdrawing the straightening device to enable the catheter tip to return to the curved condition, and inserting a filter grasping device though the catheter and a curved catheter tip to exit a distal portion to grasp the filter.
Claims17
1-20. (canceled)
A vessel filter comprising a first region at a cranial end and a second region at a caudal end, the filter movable between a collapsed position for delivery to the vessel and an expanded position for placement within the vessel, the first region having a filter portion having a converging region to direct particles toward the center of the filter, the first region including a plurality of spaced apart elongated struts and a plurality of connecting struts extending at an angle from the elongated struts, a retrieval hook positioned at a proximal portion of the filter, the second region being flared in the expanded position to have a transverse dimension increasing toward a second end portion opposite the filter portion, the second region including a plurality of vessel engaging hooks, each of the hooks having a heel portion and a vessel penetrating portion, the vessel penetrating portion having a plurality of teeth, the heel portion extending further from the caudal end than the penetrating portion.
A vessel filter comprising a body made from a single tube, the tube cut to create a plurality of elongated struts forming a filter region and a mounting region, the mounting region including a plurality of vessel engaging hooks, each of the hooks having a penetrating tip pointing in a direction toward the filter region, a plurality of teeth for engaging the vessel, and a heel extending beyond the teeth in a direction opposite the direction of the penetrating tip.
The vessel filter of claim 31, wherein the heel of the hooks extends at an angle to the longitudinal axis of the struts in the mounting region.
A vessel engaging hook comprising a penetrating region and a heel region, the penetrating region having a tip directed in a first direction, the heel region include a heel directed in a second different direction to limit penetration of the hook, and a plurality of teeth adjacent the penetrating tip to engage tissue.
Dependencies are inferred from the claim text.