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Vessel filter

  • US 8,715,313 B2
  • Filed: 07/09/2009
  • Issued: 05/06/2014
  • Est. Priority Date: 01/22/2004
  • Status: Active Grant
First Claim
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1. A vessel filter comprising a central longitudinal axis and 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 a 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 a 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 struts and 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 first curved wall facing the cranial end of the filter and a second curved wall opposite the first curved wall facing the caudal end of the filter, and a third wall joining the first and second walls and extending in a different direction than the second curved wall, the second curved wall having a plurality of teeth extending therefrom in a first direction to point toward the caudal end of the filter, and a penetrating tip pointing in a second direction different than the first direction and directed toward the cranial end of the filter and the heel portion having a curved wall portion forming a tip of the heel portion extending further from the caudal end than the penetrating portion, and the plurality of struts in the second region having an elongated reduced transverse dimension closer to the cranial end than the first curved wall is to the cranial end.

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