A conically helically shaped embolization coil (10) for occluding a blood vessel, aneurysm, and the like. The embolization coil includes a continuous platinum-tungsten alloy wire strand (11) wound into a longitudinally extending coil (12) having a plurality of tightly spaced turns...http://www.google.ca/patents/US5797953?utm_source=gb-gplus-sharePatent US5797953 - Helical embolization coil
