How many patients are considered in a Multiple Casualty Incident (MCI)?

In the context of emergency management, a Multiple Casualty Incident (MCI) is typically defined as an event that results in the injury or illness of a significant number of individuals, requiring immediate medical attention. While definitions can vary slightly depending on the organization or authority, a common standard is that an MCI involves five or more victims.

This threshold is crucial for determining the appropriate level of response, as incidents involving five or more victims often necessitate expanded resources and coordination among emergency services. Such incidents may overwhelm local emergency response capabilities, requiring the mobilization of additional personnel, equipment, and support, which emphasizes the importance of recognizing the MCI classification.

The understanding of what constitutes an MCI is fundamental for first responders and emergency planners, as it helps with effective triage and resource allocation. Being trained on this criterion enables responders to better prepare and activate protocols that ensure timely care for those affected.