When is it appropriate to declare a "Mass Casualty Incident" (MCI)?

Declaring a "Mass Casualty Incident" (MCI) is primarily based on the context of the situation concerning casualties and available medical resources. It is appropriate to declare an MCI when the number of casualties exceeds the available medical resources, as this indicates that the situation has surpassed the capacity for effective patient care with the current resources.

In an MCI, the overwhelming number of patients necessitates a coordinated response to prioritize treatment and evacuation strategies efficiently, ensuring that those with the greatest need receive attention. By declaring an MCI in this circumstance, emergency services can mobilize additional support, set up triage protocols, and manage the crisis efficiently. This declaration is a key component in disaster response, as it triggers specific protocols that help save lives and manage the scene effectively.

While other factors such as insufficient medical supplies, overwhelmed first responders, or dangers to emergency personnel may influence the urgency and complexity of the response, the defining characteristic for declaring an MCI is specifically tied to the ratio of casualties to available resources.