DSA Conventional Angiogram
Embolization refers to the passage and lodging of an embolus (clot) within the bloodstream. It may be pathological (in which sense it is also called embolism), for example a pulmonary embolism, or therapeutic, as a hemostatic treatment for bleeding or as a treatment for some types of cancer by deliberately blocking blood vessels to starve the tumor cells.
Coil embolization is a minimally invasive procedure to treat an aneurysm by filling it with material that closes off the sac and reduces the risk of rupturing or rebleeding. It is performed from “within” the artery (endovascular) through a steerable catheter inserted into the blood stream at the groin and guided to the brain. Tiny coils, glue, or mesh stents are used to promote clotting and close off the aneurysm. Coils accomplish from the inside what a surgical clip would accomplish from the outside: they stop blood from flowing into the aneurysm but allow blood to flow freely through the normal arteries.