Which condition indicates the need for immediate evacuation of a wilderness patient?

Persistent vomiting for several hours is a serious condition that necessitates immediate evacuation of a wilderness patient. Vomiting can lead to dehydration and electrolyte imbalances, particularly if it persists over time. When a patient is unable to keep fluids down, their body may quickly reach a point where it can no longer maintain normal function, leading to complications such as shock.

In a wilderness setting, access to medical care is often limited, and immediate evacuation is critical to prevent further deterioration of the patient's condition. Swift intervention can help ensure that the individual receives the necessary treatments, such as IV fluids or medications to manage their symptoms and stabilize their condition.

Mild dehydration, minor abrasions, and a low-grade fever, while they may require attention, usually do not warrant immediate evacuation. These conditions can often be managed effectively in the field with appropriate first aid measures and monitoring.