Endovascular filter
First Claim
Patent Images
1. A collapsible vena cava filter for introduction into a blood vessel of a patient comprising:
- an apical hub;
a plurality of struts secured to and diverging from said apical hub, each of said plurality of struts terminating in holding mechanisms that engage the walls of the blood vessel to secure the filter in a selected location therein;
a bioactive coating defining an exterior surface of said filter and configured to contact the walls of the blood vessel to prevent the growth of tissue that would interfere with removal of the filter; and
wherein said bioactive coating includes about 0.1 to 10.0 μ
g of bioactive material per 1.0 mm2 of a coated surface area of the filter.
1 Assignment
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Accused Products
Abstract
Endovascular filter (10) including a plurality of struts (14) with distal ends (18) adapted to anchor the filter to the vessel wall after deployment, such as by having barbs (20), the filter being adapted to be retrieved if desired. Strut distal ends (18) are coated with an antiproliferative agent (40) that inhibits the ingrowth of tissue around the filter, thereby permitting the filter to be retrieved and removed atraumatically after a prolonged period of time, thus extending the useful life of the retrievable filter. Optionally, the proximal end (22) of the filter may also be so coated, or the entire filter.
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Citations
28 Claims
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1. A collapsible vena cava filter for introduction into a blood vessel of a patient comprising:
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an apical hub;
a plurality of struts secured to and diverging from said apical hub, each of said plurality of struts terminating in holding mechanisms that engage the walls of the blood vessel to secure the filter in a selected location therein;
a bioactive coating defining an exterior surface of said filter and configured to contact the walls of the blood vessel to prevent the growth of tissue that would interfere with removal of the filter; and
wherein said bioactive coating includes about 0.1 to 10.0 μ
g of bioactive material per 1.0 mm2 of a coated surface area of the filter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 24, 25)
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9. A collapsible vena cava filter for introduction into a blood vessel of a patient comprising:
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an apical hub;
a plurality of struts secured to and diverging from said apical hub, each of said plurality of struts terminating in holding mechanisms that engage the walls of the blood vessel to secure the filter in a selected location therein;
a bioactive coating defining an exterior surface of said filter and configured to contact the walls of the blood vessel to prevent the growth of tissue that would interfere with removal of the filter; and
wherein said layer of bioactive coating contains about 100 μ
g to about 300 μ
g of drug per 0.001 inch of coating thickness. - View Dependent Claims (10, 11, 12, 13, 14, 15, 22)
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16. A collapsible filter for introduction into a blood vessel of a patient, said collapsible filter having a proximal portion, a medial portion and a distal portion, comprising:
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an apical hub, in the proximal portion of said filter, having a first or distal end and a second or proximal end;
a plurality of struts having proximal end and distal end portions, the proximal ends of said plurality of struts being secured to the first or distal end of said apical hub and diverging distally and outwardly therefrom, and each of said struts having an outwardly turned hook at their distal ends;
a pair of side elements associated with each of said struts, each side element having a proximal portion and a distal portion, the proximal end of the proximal portions being secured to the first or distal end of said apical hub and diverging distally and outwardly therefrom such that the associated strut lies between the pair of side elements, the distal portion of each side element diverging inwardly toward said associated strut such that the distal ends of the pair of side elements meet and form an eyelet through which the associated strut passes in a sliding relationship, whereby the filter as a whole may be unfolded from a collapsed insertion condition in which the struts and side elements form a narrow bundle for arrangement in a catheter like insertion instrument into an open tulip like filter configuration with the side elements interoposed between the struts;
a deployment and retrieval section secured to and extending proximately from the second or proximal end of said apical hub;
a bioactive coating defining an exterior surface of said filter to prevent the growth of tissue that would interfere with removal of the filter; and
wherein the bioactive coating includes about 0.1 to 10.0 μ
g of bioactive material per 1.0 mm2 of a coated surface area of the filter. - View Dependent Claims (17, 18, 19, 20, 21, 23, 26, 27, 28)
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Specification