Immobilization and/or retrieval of material from a body can be accomplished, in accordance with the invention, with a device that includes a sheath and a basket. The basket is movable relative to the sheath from a retracted position in which the basket is withdrawn within the sheath and an expanded position...http://www.google.com/patents/US7717924?utm_source=gb-gplus-sharePatent US7717924 - Medical retrieval device
