According to a method of occluding a bodily fluid vessel, a catheter is provided that has a first passage. The first passage has an occlusion element housed therein. The catheter is positioned in the vessel, and the occlusion element is moved out of the passage and into the vessel to thereby occlude...http://www.google.co.uk/patents/US7179250?utm_source=gb-gplus-sharePatent US7179250 - Methods and apparatus for treating body tissues and bodily fluid vessels