Medical device coating with a biocompatible layer
First Claim
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1. A medical device comprising:
- an outer surface; and
a hydrogel layer covalently attached to at least a portion of the outer surface, the hydrogel layer adapted to contact a body tissue or fluid, wherein the hydrogel layer comprises a biocompatible polymer population comprising;
a first hydrophilic polymer species comprising polyethylene glycol (PEG) having between two to twelve branch arms, wherein at least a subset of the branch arms comprises a reactive sulfonyl group, anda second hydrophilic polymer species comprising polyacrylamide having one or more pendant reactive nucleophilic groups,wherein the reactive sulfonyl group of at least one of the subset of the branch arms of the PEG is reacted with the one or more pendant reactive nucleophilic groups of the polyacrylamide to at least partially covalently link the PEG to the polyacrylamide.
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Abstract
Medical devices with a hydrogel layer covalently attached to a portion of the outer surface of the medical device are provided along with methods for applying the coating. The hydrogel layer can include a first polymer species comprising polyethylene glycol (PEG) and a second polymer species. Examples of the second polymer species include PEG and polyacrylamide (PAM). The first and second species can be at least partially cross-linked. Methods for forming the hydrogel coatings on the medical devices are provided including nucleophilic conjugate reactions, such as Click reactions.
247 Citations
29 Claims
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1. A medical device comprising:
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an outer surface; and a hydrogel layer covalently attached to at least a portion of the outer surface, the hydrogel layer adapted to contact a body tissue or fluid, wherein the hydrogel layer comprises a biocompatible polymer population comprising; a first hydrophilic polymer species comprising polyethylene glycol (PEG) having between two to twelve branch arms, wherein at least a subset of the branch arms comprises a reactive sulfonyl group, and a second hydrophilic polymer species comprising polyacrylamide having one or more pendant reactive nucleophilic groups, wherein the reactive sulfonyl group of at least one of the subset of the branch arms of the PEG is reacted with the one or more pendant reactive nucleophilic groups of the polyacrylamide to at least partially covalently link the PEG to the polyacrylamide. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29)
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Specification