A charge nurse is managing multiple critical situations during a night shift when a mass casualty incident occurs. Which action should the charge nurse prioritize first?

In a mass casualty incident (MCI), the immediate instinct may be to jump into clinical action—triaging patients or calling for more hands. However, the charge nurse's highest priority is not to perform a single clinical task but to ensure the entire facility transitions from standard operations to a coordinated disaster response. Without a structured command system, individual efforts become chaotic, resources are misallocated, and patient outcomes deteriorate. This is why activating the hospital's disaster response protocol and establishing the incident command structure must come first.

The Hospital Incident Command System (HICS) is a standardized, scalable management structure designed to clarify roles, responsibilities, and reporting relationships during an emergency. Activating the disaster protocol triggers a pre-planned chain of events: designated leaders for operations, logistics, planning, and finance are mobilized, a command center is established, and clear communication channels are opened both internally and with external agencies. Research on MCI preparedness consistently identifies a formalized command structure as the backbone of an effective response. A study assessing a hospital's Code Orange plan found that alignment with international guidelines, which mandate an incident command system, is essential for operational efficiency and timely care delivery during emergencies ^[1]. Without this structure, the hospital cannot effectively absorb the surge.

Let's examine why the alternative actions, while critical, must follow system activation:

• Calling additional staff (Option 1): This is a logistics function. The incident command structure dictates how, when, and from where staff are recalled or reassigned. A charge nurse independently calling other units can cause confusion, strip those units of essential personnel without a coordinated plan, and bypass the official communication cascade that ensures the right people with the right skills are deployed.


• Reassigning current staff (Option 4): This is an operations and planning function. Prematurely reassigning staff before the command structure is active can leave critical areas like the ICU or ongoing emergency department patients dangerously understaffed. The incident command team, with a facility-wide view, makes these decisions based on a formalized surge capacity plan. A retrospective analysis of a pediatric MCI highlighted that a coordinated response, including organized staff mobilization, was key to managing the surge of 49 casualties arriving simultaneously .


• Beginning triage (Option 3): This is a direct patient care action. While triage is the first clinical step for incoming patients, it is a task performed within the operational framework set by the incident command. A study of a wartime MCI in Israel demonstrated that the MCI protocol's activation was the prerequisite for the entire emergency department's operational shift, enabling organized triage and treatment under extreme pressure . Triage without a supporting command structure leads to bottlenecks in imaging, insufficient surgical resources, and a lack of situational awareness.

The charge nurse's action directly addresses both operational and psychological preparedness. From an operational standpoint, activating the protocol is the single action that mobilizes the entire hospital's resources according to a practiced plan. From a psychological perspective, a clear command structure reduces ambiguity and role conflict, which are major sources of stress during an MCI. Research on nurses' preparedness for mass-casualty events underscores that both psychological and operational readiness are key to effective performance under high-pressure conditions . By establishing command, the charge nurse provides a cognitive framework for the entire team, reducing chaos and enabling focused, role-appropriate actions. The triage, staffing, and reassignment decisions are then made correctly, efficiently, and with full situational awareness by the designated leaders within the incident command structure.