Patent ID: 7374568

Claim:
A method for embolizing a vascular aneurysm comprising an aneurysmal sac, an opening, and fundus by delivering to said vascular aneurysm via a catheter having proximal and distal ends a composition comprising (1) a biocompatible polymer; (2) a biocompatible water insoluble contrast agent; and (3) a biocompatible solvent, said method includes: (a) positioning the distal end of said catheter in said vascular aneurysm wherein the proximal end of said catheter is connected to a source of said composition and whereby said composition can be injected into the vascular aneurysm through said catheter wherein the distal end of the catheter is positioned through the opening into the aneurysmal sac to be embolized about 2/3 of the distance between the opening and the fundus; and, (b) injecting an amount of said composition into the vascular aneurysm; and, (c) waiting a sufficient period of time to permit blood flow to transport biocompatible solvent away from the vascular aneurysm; wherein steps (b) and (c) may be repeated until the vascular aneurysm is substantially filled, and wherein said composition has a viscosity at about 40° C. of greater than about 1000 centistokes, wherein no flow arresting device is activated during steps (b) and (c), and further wherein (d) after determining that the vascular aneurysm is substantially filled, activating a balloon capable of sealing the opening of the vascular aneurysm which is being embolized; and, (e) injecting a final amount of said composition into the vascular aneurysm such that the vascular aneurysm is completely filled with embolizing composition; wherein the balloon is inflated in an arterial site to seal a neck of the vascular aneurysm that is about 100% to 130% of an inner diameter of a vascular vessel, and wherein no flow arresting device is activated during steps (b) and (c).