Cellular phones often fail in such situations due to overcharge. Appropriate marking of the staff in charge is also an important part of communication. 3.11 Protective Measures Security services have to be operational at very early stages. 3.12 Medical, Operational and General Resources Not only the treatment areas but also departments such as radiology, blood bank, laboratory, and pharmacies have to prepare for more extensive performances. 3.13 Internal and External Information Information does not only include the contact between rescue staff and media at the damage area.
Information flow is also important within the hospital.
Information chaos with subsequent criticism can only be prevented by a clear information concept. Appropriate and available personnel, psychiatrists and pastors are compulsory elements of such a concept. 3.15 Traffic Control and Cordoning Off Traffic control and blocking access to certain areas help to avoid chaos in the case of a mass accident. Cooperation with police forces will be necessary. 3.16 Substitute Measures and Redundancies Technical systems such as communication systems, powerplant, and medical gas supply may fail, due to overcharge or other reasons.