A vasoocclusive coil is reinforced with a stretch resistant member to improve safety during retraction of the coil. The stretch resistant member is fixedly attached at one end to the vasoocclusive coil, and the other end of the stretch resistant member is detachably mounted to an elongated pusher member...http://www.google.co.uk/patents/US8029464?utm_source=gb-gplus-sharePatent US8029464 - Vasoocclusive coil with enhanced therapeutic strand structure
