Patent ID: 6756031
Filing Date: 2004-06-29
Classification: A61K,A61P

Abstract:
A composition comprising:(a) from about 2.5 to about 8.0 weight percent of a polymer selected from the group consisting of polyacrylonitrile, polyvinylacetate, cellulose acetate butyrate, nitrocellulose and copolymers of urethane/carbonate and copolymers of styrene/maleic acid, and mixtures thereof wherein said polymer has a molecular weight of at least 50,000; (b) from about 10 to about 40 weight percent of a contrast agent wherein said contrast agent is tantalum or tantalum oxide; (c) from about 52 to about 87.5 weight percent of dimethylsulfoxide which solubilizes said polymer; and wherein the weight percent of the polymer, contrast agent and biocompatible solvent is based on the total weight of the complete composition.