What should be done first when encountering a scene with multiple casualties?

Establishing a command system and beginning triage is essential in a multiple casualty incident because it helps manage the chaos effectively and ensures that patients receive the appropriate level of care based on the severity of their conditions. Triage allows for the prioritization of treatment, ensuring that those who are most critically injured receive immediate attention while others who are less severely injured can wait.

In these situations, establishing a command structure enhances coordination among responders, minimizes confusion, and optimizes the use of available resources. This systematic approach is vital in maximizing the number of lives saved in a high-stress environment with multiple individuals requiring medical assistance.

Responding to the first patient encountered, although instinctual, could jeopardize the overall scene management and lead to a lack of organization. Calling for backup without first establishing triage may delay critical treatment times for severely injured patients. Leaving the area due to perceived danger could prevent necessary intervention for those who need it most and is against the principle of care in emergency situations.