Coated implantable medical device
First Claim
1. An implantable medical device, comprising:
- an expandable stent sized and shaped for introduction into a vascular system of a patient, the expandable stent having at least one surface;
a coating layer in direct contact with the at least one surface and comprising a first polymer posited between the at least one surface of the expandable stent and at the least one layer comprising a bioactive agent;
the porous layer comprising a second polymer posited over the at least one layer comprising a bioactive agent and controlling the release of the bioactive agent, the first polymer and the second polymer being the same or different;
wherein the expandable stent is capable of eluting the bioactive agent from the bioactive layer through the porous layer when the expandable stent is placed in the vascular system of the patient;
wherein said stent is a metal stent, and said at least one surface is a metal surface;
wherein said coating layer is in contact with said metal surface; and
wherein said first polymer is a parylene or a parylene derivative polymer.
3 Assignments
0 Petitions
Accused Products
Abstract
A coated implantable medical device 10 includes a structure 12 adapted for introduction into the vascular system, esophagus, trachea, colon, biliary tract, or urinary tract, and at least one layer 18 of an immunosuppressive agent posited over at least one surface of the structure 12. Optionally, the device 10 can include at least one porous, preferably polymeric layer 20 posited over the layer 18 of immunosuppressive agent, and can alternatively or additionally include at least one coating layer 16 posited on one surface of the structure 12, the at least one layer 18 of immunosuppessive agent being posited in turn on at least a portion of the coating layer 16. The porous layer 20 and the coating layer 16 each provide for the controlled release of the bioactive material from the device 10. The structure 12 is preferably configured as a coronary stent. The polymer of the porous layer 20 is preferably applied by vapor or plasma deposition. It is particularly preferred that the polymer is a polyamide, parylene or a parylene derivative which is deposited without solvents, heat or catalysts, but rather by condensation of a monomer vapor.
-
Citations
12 Claims
-
1. An implantable medical device, comprising:
-
an expandable stent sized and shaped for introduction into a vascular system of a patient, the expandable stent having at least one surface; a coating layer in direct contact with the at least one surface and comprising a first polymer posited between the at least one surface of the expandable stent and at the least one layer comprising a bioactive agent; the porous layer comprising a second polymer posited over the at least one layer comprising a bioactive agent and controlling the release of the bioactive agent, the first polymer and the second polymer being the same or different; wherein the expandable stent is capable of eluting the bioactive agent from the bioactive layer through the porous layer when the expandable stent is placed in the vascular system of the patient; wherein said stent is a metal stent, and said at least one surface is a metal surface; wherein said coating layer is in contact with said metal surface; and wherein said first polymer is a parylene or a parylene derivative polymer. - View Dependent Claims (4, 5, 6)
-
-
2. An implantable medical device, comprising:
-
an expandable stent sized and shaped for introduction into a vascular system of a patient, the expandable stent having at least one surface; a coating layer in direct contact with the at least one surface and comprising a first polymer posited between the at least one surface of the expandable stent and at least one layer comprising a bioactive agent; the at least one layer comprising a bioactive agent posited over the coating layer and under a porous layer consisting essentially of one or more biocompatible polymers selected from the group consisting of;
a parylene polymer, a poly(alkylmethacrylate) polymer, and an ethylene-vinyl acetate copolymer;the porous layer posited over the bioactive agent and controlling the release of the bioactive agent; wherein the expandable stent is capable of eluting the bioactive agent from the at least one layer comprising a bioactive agent through the porous layer when the expandable stent is placed in the vascular system of the patient; and wherein the porous layer comprises a material selected from the group consisting of;
parylene and poly(n-butyl methacrylate). - View Dependent Claims (7, 8, 9, 10, 11, 12)
-
-
3. An implantable medical device, comprising:
-
an expandable stent sized and shaped for introduction into a vascular system of a patient, the expandable stent having at least one surface; a coating layer in direct contact with the at least one surface and comprising a first polymer posited between the at least one surface of the expandable stent and at least one layer comprising a bioactive agent; the at least one layer comprising a bioactive agent posited over the coating layer and under a porous layer consisting essentially of one or more biocompatible polymers selected from the group consisting of;
a parylene polymer, a poly(alkylmethacrylate) polymer, and an ethylene-vinyl acetate copolymer;the porous layer posited over the bioactive agent and controlling the release of the bioactive agent; wherein the expandable stent is capable of eluting the bioactive agent from the at least one layer comprising a bioactive agent through the porous layer when the expandable stent is placed in the vascular system of the patient; and wherein the bioactive agent consists essentially of an immunosuppressive agent and the porous layer consists essentially of a biocompatible polymer selected from the group consisting of;
a parylene polymer, a poly(alkylmethacrylate) polymer and an ethylene-vinyl acetate copolymer.
-
Specification