LOW RADIAL FORCE FILTER

摘要

The disclosure provides a filter apparatus and method of filtering in a body vessel. The filter apparatus comprises a filter unit and an expandable introducer designed to deliver the filter unit to the target filtering site. The filter unit attaches to the expandable introducer via a plurality of anchors on the filter unit. The expandable introducer delivers and presses the anchors to the vessel wall during implantation. After implantation, the filter unit exerts minimal or about zero radial force against the vessel wall.

主权项

1. A method of treatment in a body vessel having a wall, the method comprising:
positioning a filter apparatus having an anchor disposed in a casing in the body vessel, the filter apparatus comprising:
a filter unit having a filter leg comprising a first end extending to a second end including the anchor being biased to curl; andan expandable introducer having the casing removably attached to the filter unit at the anchor, wherein the apparatus has a collapsed state and an expanded state for attaching the filter unit to the wall; contacting the anchor against the wall by way of the expandable introducer by moving the apparatus from the collapsed state to the expanded state; and attaching the anchor to the wall by removing the anchor from the casing.