The present invention relates to management of information relating to medical fluids, containers therefor, and medical fluid administration devices for administering such medical fluids to patients. An administrative module in a user computer configures a range of access levels for inbound and outbound communications and has list maintenance functions. The management server then associates each client group with each device group. The shaft has sufficient columnar strength to maintain distraction between the first and second vertebrae via the clamps, while also allowing at least one of the relative movements between the first and second vertebrae selected from the movements including lateral bending, flexion, extension and axial rotation.