Patent ID: 6962689

Claim:
A method for enhancing the formation of a solid, non-migratory coherent mass at a selected vascular site of a mammal which method comprises: (a) placing a delivery device having an ejection port at a selected vascular site in a mammal; (b) delivering through the ejection port of the delivery device a composition capable of embolizing an aneurysm at a vascular site comprising: a. a biocompatible polymer at a concentration of from about 12 to about 50 weight percent based on the total weight of the composition; b. a biocompatible contrast agent wherein a sufficient amount of said contrast agent is employed in said composition to effect visualization in vivo; and c. a biocompatible solvent which solubilizes said biocompatible polymer; wherein sufficient amounts of said polymer are employed in said composition such that upon delivery to said vascular site a polymer precipitate forms which embolizes said vascular site; and further wherein the biocompatible polymer has a molecular weight and/or concentration sufficient to impart to the composition a viscosity of at least about 150 cSt at 40° C.