A stent and catheter for implanting or removing a helical-shaped stent within a body passageway; the catheter having an elongate sheath capable of being secured to one end of the stent at a distal region of the sheath and an inner member extending from the sheath capable of being secured to the other...http://www.google.de/patents/US6533805?utm_source=gb-gplus-sharePatent US6533805 - Prosthesis and method for deployment within a body lumen
