IVC filter with translating hooks

摘要

A filter with translating hooks is described. The filter can include strut members having first and second struts connected by a connecting portion. A translating hook is disposed adjacent the connecting portion of the strut members, the hook including a first elongate member attached at one end to the first strut and a second elongate member attached at one end to a second strut, the opposite ends of the elongate members connected together to define a tip. The translating hooks are configured to bend toward a central axis of the filter when the filter is in a collapsed configuration for delivery to a blood vessel and recovery from a blood vessel, and away from the central axis of the filter when the filter is in an expanded configuration within a blood vessel such that the hooks engage a vessel wall.

主权项

1. A filter with an assembly comprising:
a hub; and hollow, kite-shaped arms comprising:
a three- or four-sided inner leaf comprising two wire-arm segments with first segment ends connected to the hub;a triangular outer leaf comprising two wire-arm segments with first segment ends connected together forming an outer leaf vertex with a tip;wherein the second, inner-leaf segment ends connect to the second, outer-leaf segment ends to form two joining vertices between the leaves with the bases of the leaves formed from a line connecting the joined vertices, but not containing a wire;anda hook having two members wherein the members connect at first ends into a tip,andconnect at second ends to the wire segments adjacent a joining vertex or an outer leaf vertex and near to and bridging the vertexand wherein
the filter has two states a retracted state having a first diameter and length and an expanded state having a second diameter larger than the first diameterandhook bias causes the hook tip to point inward in the retracted state and causes the hook tip to rotate outward in the expanded state.