Terminal tools 16 are fixed to end portions of a plurality of wires 12 that are covered with a shield lacing 10, and a shield case 30 is connectedfixed to the shield lacing 10. The vascular access systems comprise an anastomosis graft vessel, an occlusal balloon, and a port device for accessing the occlusal balloon. When the computer 10 receives notification that the attachment has ended from the storage device system 20, the identified target device is mounted on the directory in which the snapshot files are stored.