In normal conditions, evaluation of patients with penetrating and blunt abdominal or pelvic trauma routinely includes imaging procedures such as a contrast CT scan and retrograde cystourethrography (Lynch et al. 2003; McAninch and Santucci 2002). When mass casualty protocols are instituted, decisions need to be made either with or without the minimal mandatory imaging procedures. The mass casualty scenario theorists advocate a unidirectional flow of patients in order to avoid creation of bottlenecks, usually at imaging departments (Jacobs et al. 1979). The normal pattern of sending a patient for a CT scan and returning him to the emergency room for decision making is not acceptable when the protocols of mass casualties are implemented.

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