During a hospital-wide emergency drill, a nurse is assigned to the emergency response team. Which action should the nurse prioritize first when responding to a mass casualty incident?

In mass casualty incidents, triage protocols are prioritized to categorize patients by severity, ensuring efficient resource allocation and maximizing survival. Immediate treatment or other actions should follow after triage is established.

Understanding Mass Casualty Incident (MCI) Response
In a hospital-wide emergency drill for a mass casualty incident (MCI), the primary goal shifts from individual patient care to doing the greatest good for the greatest number of people. An MCI, by definition, overwhelms the immediate resources of the facility with a sudden surge of casualties. In this context, the standard "first-come, first-served" approach to treatment is not only inefficient but can be dangerous, as critically injured patients who arrive later may deteriorate while resources are spent on patients with less severe injuries.

Why Triage is the First Priority
The correct action is to implement triage protocols. Triage is a dynamic decision-making process that rapidly categorizes patients based on the severity of their condition and their likelihood of survival with immediate intervention. This is the critical first step because it creates order from chaos, allowing the emergency response team to systematically allocate limited personnel, equipment, and space. Without a structured triage system, the response becomes disorganized, and the team cannot effectively identify which patients require life-saving interventions within minutes to survive. The reviewed literature on hospital-based MCI triage tools highlights that the effectiveness of the entire response hinges on the accuracy and applicability of the triage system used at the hospital door to manage the sudden surge ^[1].

Analyzing the Incorrect Options
- Beginning immediate treatment of the first patient who arrives bypasses the essential step of triage. While it may seem intuitive to start helping the first person you see, this action could lead to a patient with minor injuries consuming the team's attention while a second, critically ill patient with a life-threatening airway obstruction or hemorrhage goes unnoticed. Triage ensures that patients with the most time-sensitive, survivable conditions are treated first.
- Contacting family members is an important psychosocial and communication task, but it is not a clinical priority during the immediate response phase of an MCI. This task is typically delegated to a designated support team or social services after the immediate life-saving triage and treatment processes are underway.
- Preparing discharge paperwork for current patients is a strategy to create surge capacity by rapidly freeing up inpatient beds. While this is a crucial parallel action for hospital incident command, it is not the first action of a nurse assigned to the direct patient response team. The immediate priority for the clinical response team at the point of patient arrival is to sort and stabilize the incoming casualties.

Clinical Application of Hospital-Based Triage
In a hospital-based MCI, triage is performed at the hospital entrance or a designated casualty collection point. Nurses, often as part of a triage team, use a validated tool to quickly assess each patient's airway, breathing, circulation, and mental status. Patients are then assigned a category, typically color-coded, that dictates the urgency and location of care. The challenge, as noted in the review, is that many triage tools were designed for the prehospital setting, and their effectiveness in the unique environment of a hospital receiving a sudden, unsorted surge of patients is an area of active study to ensure the highest accuracy in patient categorization ^[1]. The nurse’s role is to apply these protocols swiftly and accurately to establish a clear clinical priority list for the entire team.