Removable embolus blood clot filter
First Claim
1. A filter to be placed in a flow of blood through a vessel, the filter comprising:
- a tubular member defining a hub disposed along a longitudinal axis;
at least one anchor member projecting from the hub, the at least one anchor member including a hook that penetrates a blood vessel wall when the filter is placed in a blood vessel, the hook spaced along the longitudinal axis from the hub and spaced a first radial distance from the longitudinal axis; and
at least one locator member projecting from the hub, the at least one locator member having a tip segment spaced along the longitudinal axis from the hub and spaced a second radial distance from the longitudinal axis, the second radial distance being less than the first radial distance, the at least one locator member having at least four segments including the tip segment, each disposed on respective distinct axes, the four segments comprising;
a proximal segment proximate the hub;
a first segment that extends along a first angle of about 60 degrees with respect to the longitudinal axis;
a second segment that extends along a second angle of about 20 degrees with respect to the longitudinal axis; and
the tip segment that extends along a third angle of less than about 1 degree with respect to the longitudinal axis.
1 Assignment
0 Petitions
Accused Products
Abstract
A removable blood clot filter includes a number of locator members and anchor members disposed radially and extending angularly downward from a hub. The locator members include a number of linear portions having distinct axes configured to place a tip portion approximately parallel to the walls of a blood vessel when implanted and to apply sufficient force to the vessel walls to position the filter near the vessel centerline. The anchor members each include a hook configured to penetrate the vessel wall to prevent longitudinal movement due to blood flow. The hooks may have a cross section sized to allow for a larger radius of curvature under strain so that the filter can be removed without damaging the vessel wall.
284 Citations
18 Claims
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1. A filter to be placed in a flow of blood through a vessel, the filter comprising:
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a tubular member defining a hub disposed along a longitudinal axis; at least one anchor member projecting from the hub, the at least one anchor member including a hook that penetrates a blood vessel wall when the filter is placed in a blood vessel, the hook spaced along the longitudinal axis from the hub and spaced a first radial distance from the longitudinal axis; and at least one locator member projecting from the hub, the at least one locator member having a tip segment spaced along the longitudinal axis from the hub and spaced a second radial distance from the longitudinal axis, the second radial distance being less than the first radial distance, the at least one locator member having at least four segments including the tip segment, each disposed on respective distinct axes, the four segments comprising; a proximal segment proximate the hub; a first segment that extends along a first angle of about 60 degrees with respect to the longitudinal axis; a second segment that extends along a second angle of about 20 degrees with respect to the longitudinal axis; and the tip segment that extends along a third angle of less than about 1 degree with respect to the longitudinal axis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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Specification