An embolizing system includes a catheter, having a lumen, an elongate member, insertable within the lumen of the catheter, and an occlusion particle. The occlusion particle has a receiving passageway therein for receiving the elongate member so the elongate member guides movement of the occlusion pa...http://www.google.de/patents/US5891155?utm_source=gb-gplus-sharePatent US5891155 - Embolizing system
