Methods and apparatus for filtering a body lumen

摘要

An implantable lumen filter is described. The filter may include a body formed from an elongate member. The body may include loops encircling an axis extending along the length of the body. The body may be sized to be implanted into a body lumen. The body may be capable of transitioning from a collapsed state to a deployed state. The filter may include a first group of a plurality of members positioned around at least one loop of said body. At least a portion of the plurality of members may be oriented towards the axis. The plurality of members may be arranged to capture and/or lyse particulates of a selected size and/or to inhibit the particulates from passing through the body. Methods to of making, deploying, and retrieving the same are described.

主权项

1. An implantable lumen filter comprising:
a body formed from an elongate member having a cylindrical, spiral configuration having loops encircling an axis extending along a length of the body, the body being sized to be implanted into a body lumen, the body being configured to transition from a compressed cylindrical state to a deployed cylindrical state; and a first plurality of members positioned around at least one loop of the body at a first position along the axis, the first plurality of members being oriented towards the axis, the first plurality of members being arranged to lyse particulates of a selected size; a second plurality of members positioned around at least one loop of the body at a second position along the axis, and radiating towards the axis of the filter, the second plurality of members being oriented to capture or inhibit the particulates of another selected size from passing through the body, the second plurality of members being dimensioned to allow blood components smaller than the selected size and the another selected size to pass through the body; wherein the second plurality of members is offset a distance from the first plurality of members along the length of the body; and wherein the orientation of the first plurality of members toward the axis is different than the orientation of the second plurality of members toward the axis.