Drug coating with topcoat
First Claim
1. A medical device having at least a portion which is implantable into the body of a patient, wherein at least a part of the device portion is covered with a coating for release of at least one biologically active material, wherein said coating comprises an undercoat having an outer surface and comprising a polymeric material incorporating an amount of biologically active material therein for timed release therefrom, and wherein said coating further comprises a topcoat which covers less than the entire outer surface of the undercoat, said topcoat comprising a polymeric material substantially free of pores and porosigens.
3 Assignments
0 Petitions
Accused Products
Abstract
A coating and method for a coating an implantable device or prostheses are disclosed. The coating includes an undercoat of polymeric material containing an amount of biologically active material, particularly heparin, dispersed therein. The coating further includes a topcoat which covers less than the entire surface of the undercoat and wherein the topcoat comprises a polymeric material substantially free of pores and porosigens. The polymeric material of the topcoat can be a biostable, biocompatible material which provides long term non-thrombogenicity to the device portion during and after release of the biologically active material.
144 Citations
50 Claims
- 1. A medical device having at least a portion which is implantable into the body of a patient, wherein at least a part of the device portion is covered with a coating for release of at least one biologically active material, wherein said coating comprises an undercoat having an outer surface and comprising a polymeric material incorporating an amount of biologically active material therein for timed release therefrom, and wherein said coating further comprises a topcoat which covers less than the entire outer surface of the undercoat, said topcoat comprising a polymeric material substantially free of pores and porosigens.
- 18. A stent for implantation in a vascular lumen comprising a tubular body having open ends and a sidewall and a coating on at least a part of a surface of said sidewall, said coating further comprising an undercoat having an outer surface and comprising a polymeric material incorporating an amount of a biologically active material therein for timed release therefrom, and wherein said coating further comprises a topcoat comprising a polymeric material selected from the group consisting of fluorosilicone and polyethylene glycol (PEG), wherein said topcoat covers less than the entire outer surface of the undercoat and wherein said topcoat is substantially free of pores and porosigens.
-
29. A method of coating an implantable stent prosthesis having at least a portion which is implantable into the body of a patient, wherein at least a part of the stent portion is covered with a coating for release of at least one biologically active material;
- the method comprising;
(a) applying an undercoat comprising a polymeric material and the biologically active material to the stent portion; and
(b) applying a topcoat over the surface of the undercoat, said topcoat comprising a polymeric material, substantially free of pores and pore-forming materials. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- the method comprising;
-
41. A method of using an implantable stent prosthesis comprising:
-
(a) providing an implantable stent prosthesis having at least a portion which is implantable into the body of a patient, wherein at least a part of the device portion is covered with a coating for release of at least one biologically active material, wherein said coating comprises an undercoat having an outer surface and comprising a polymeric material incorporating an amount of biologically active material therein for timed release therefrom, and wherein said coating further comprises a topcoat which covers less than the entire outer surface of the undercoat said topcoat comprising a polymeric material substantially free of pores and porosigens;
(b) implanting the device into the body of a patient; and
(c) allowing the biologically active material to be released such that the topcoat limits the burst release of the biologically active material. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
-
Specification