Importance

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Abstract

A blood clot filter, collapsible toward a central longitudinal axis into a collapsed configuration for insertion into a blood vessel and radially expandable outwardly from the longitudinal axis to an expanded configuration for contact with the inner wall of the blood vessel at two longitudinal spaced locations. A first plurality of elongate arms, in the expanded configuration, curve outwardly from the longitudinal axis toward the leading end of the filter to form a first filter basket and to center a hub at the trailing end of the filter within the vessel. A second plurality of elongate legs angle outwardly away from the longitudinal axis toward the leading edge of the filter in the expanded configuration to form a second filter basket opening toward the leading end. The ends of these legs include hooks, at least a portion of which is a reduced cross sectional area relative to the cross sectional area of the adjacent leg to permit the hooks to bend and straighten.

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First Claim