This fluid circuit kit (201) comprises a contrast medium line (205), a saline line (206), a syringe line (204), a patient line (208), and a base line section (210) to which each line is connected. The contrast medium line (205) is connected to the base line section (210) by a dual check valve (215A) that only allows the flow of a fluid in a predetermined direction, and the saline line (206) is also connected to the base line section (210) by a similar dual check valve (215B). The fluid circuit kit (201) further comprises a release valve (202A) that is disposed on the saline line (206) and opens and closes the line by moving a movable member (203) thereof.
