Embolus blood clot filter with bio-resorbable coated filter members
First Claim
Patent Images
1. A filter to be placed in a blood vessel, the filter comprising:
- a) a plurality of appendages, each appendage having a curved anchor with a sharp free end tip;
b) a bio-resorbable mass of material that encapsulates the entire anchor including the sharp free end tip, wherein said mass of material has an outer surface that is smooth for enabling the mass of material to slide along the inside of the vessel; and
c) wherein the curved anchor of at least one of the plurality of appendages has a deformed configuration so as to be generally linear, the curved anchor being encapsulated by the bio-resorbable material to maintain the curved anchor in the deformed configuration.
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Accused Products
Abstract
A blood clot filter includes a number of locator members and anchor members, each of the members tipped with a retainer encompassed within bio-resorbable cover material. Upon delivery into a blood vessel, the locator and anchor members position the filter near the vessel centerline. After a period of time, the bio-resorbable cover material resorbs, allowing the retainer on the members to penetrate and attach to the vessel wall. A method of implanting the filter includes delivering the filter into a blood vessel and allowing the bio-resorbable cover material to resorb so retainers on the members can engage the vessel walls.
37 Citations
12 Claims
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1. A filter to be placed in a blood vessel, the filter comprising:
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a) a plurality of appendages, each appendage having a curved anchor with a sharp free end tip; b) a bio-resorbable mass of material that encapsulates the entire anchor including the sharp free end tip, wherein said mass of material has an outer surface that is smooth for enabling the mass of material to slide along the inside of the vessel; and c) wherein the curved anchor of at least one of the plurality of appendages has a deformed configuration so as to be generally linear, the curved anchor being encapsulated by the bio-resorbable material to maintain the curved anchor in the deformed configuration. - View Dependent Claims (2, 3, 4)
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5. A filter to be placed in a blood vessel, the filter comprising:
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a) a plurality of appendages, each appendage having a curved anchor with a sharp free end tip; b) a bio-resorbable mass of material that encapsulates the entire anchor including the sharp free end tip, wherein said mass of material has an outer surface that is smooth for enabling the mass of material to slide along the inside of the vessel; c) a hub coupled to the plurality of appendages the plurality of appendages further comprising a plurality of locator members that locate the filter with respect to a wall of the blood vessel; and d) a plurality of anchor members coupled to the hub, at least one of the plurality of anchor members having a retainer configured to penetrate a wall of the blood vessel when the filter is disposed in the blood vessel, wherein a bio-resorbable material encompasses at least a portion of the retainer of the at least one of the plurality of anchor members, and e) the retainer is held by the mass of bio-resorbable material in a first linear position, moving to a second curved position when the bio-resorbable material resorbs. - View Dependent Claims (6)
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7. A filter to be placed in a blood vessel, the filter comprising:
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a) a plurality of appendages, each appendage having a curved anchor with a sharp free end tip; b) a bio-resorbable mass of material that encapsulates the entire anchor including the sharp free end tip, wherein said mass of material has an outer surface that is smooth for enabling the mass of material to slide along the inside of the vessel; c) a hub disposed along a longitudinal axis, the hub being coupled to the plurality of appendages; and wherein the appendages are each coupled to the hub, each curved anchor spaced along the longitudinal axis from the hub at a first longitudinal distance, and radially spaced from the longitudinal axis a first radial distance, each curved anchor being configured to penetrate a wall of the blood vessel when the filter is disposed in the blood vessel, and wherein the plurality of appendages include a plurality of locator members, each locator member including; a first portion proximate the hub; a second portion that extends from the first portion along a first axis; a third portion that extends from the second portion along a second axis distant from the first axis; and wherein each curved anchor comprises a hook having a curved configuration in an operative condition and a generally linear configuration in a constrained condition, wherein the bio resorbable material maintains the hook in the linear configuration until the bio resorbable material is resorbed. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification