Hydrocolloid containing liquid carrier for a diagnostic or therapeutic agent
AssigneeE. R. Squibb & Sons, Inc.
InventorJames Ling Chen
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Abstract
On contacting a moist aqueous surface, a fine particle size hydrocolloid suspended in a non-aqueous water-immiscible mobile liquid attaches itself through rapid hydration to the moist surface. Drainage of the mobile liquid leaves a coating of the particles of the hydrocolloid on the surface. If a radiopaque agent or a medicinal agent is co-suspended with the hydrocolloid, a uniform thin layer of the agent will be carried by the particles of hydrated hydrocolloid onto the moist surface.
Claims6
A liquid carrier for a therapeutic or diagnostic agent consisting essentially of from about 5% to about 30% by weight of a water-soluble or water-swellable hydrophilic colloid, from about 0.1% to about 10% by weight of a non-ionic wetting agent, the balance of the composition being mainly a non-aqueous water-immiscible mobile liquid, the liquid being mineral oil or a fatty acid ester of a polyhydric alcohol wherein the fatty acid has from about 12 to about 20 carbon atoms, the hydrophilic colloid being suspended in the mobile liquid.
Dependencies are inferred from the claim text.