Prosthesis with improved biocompatibility
First Claim
1. A surgically implantable prosthesis comprising at least an outer flexible envelope having enclosed therein a hydrogel having both hydrophobic and hydrophilic regions wherein the improvement consists of hydrophobic regions selected from the group consisting of polymerized N-vinylic hydrophobic monomers, hydrolyzed polyacrylonitriles, and combinations thereof.
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Accused Products
Abstract
An implantable prosthesis comprises a hydrogel enclosed within a flexible envelope. The hydrogel contains both hydrophilic and hydrophobic domains. It is prepared by copolymerizing a hydrophilic monomer such as water soluble N-vinylpyrrolidone, acrylates or methacrylates with non-water soluble monomers such as acrylates, methacrylates, N-vinyl carbazole, its derivatives, or a non-water soluble derivative of N-vinylpyrrolidone. The flexible envelope may be either porous or non-porous. The hydrogel may be either solid or composed of particles of a size greater than the porosity of the envelope.
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Citations
16 Claims
- 1. A surgically implantable prosthesis comprising at least an outer flexible envelope having enclosed therein a hydrogel having both hydrophobic and hydrophilic regions wherein the improvement consists of hydrophobic regions selected from the group consisting of polymerized N-vinylic hydrophobic monomers, hydrolyzed polyacrylonitriles, and combinations thereof.
- 14. A surgically implantable prosthesis comprising at least an outer flexible envelope having enclosed therein a hydrogel having both hydrophobic and hydrophilic regions wherein the hydrogel is prepared by the copolymerization of a hydrophilic monomer with a N-vinylic hydrophobic monomer.
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16. A surgically implantable prosthesis comprising at least one flexible envelope having enclosed therein a hydrogel wherein the hydrogel comprises a hydrolyzed polyacrylonitrile having both carboxylic or amide groups and nitrile groups.
Specification