What Is a Medical Evacuation (EVASAN)? Definition and How It Works

Definition

EVASAN is short for évacuation sanitaire — the French term for what English speakers usually call a medical evacuation or MEDEVAC. It refers to the medically supervised, organized transport of a patient from where they currently are (a hospital, a home, an accident site) to a facility better suited to their condition, whether domestically or internationally.

The term covers very different situations: an international medical repatriation after an accident abroad, an inter-hospital transfer to reach a specialist unit (intensive care, ECMO, neurosurgery...), or an urgent evacuation from a remote location.

EVASAN, medical repatriation, MEDEVAC: what's the difference?

In practice these terms are often used interchangeably. There are, broadly, two categories: medical repatriation, which brings a patient back to their country of residence or a hospital of their choosing — typically after an incident abroad, often coordinated with travel insurance or assistance — and inter-hospital transfer, which moves an already-hospitalized patient to a better-equipped facility, independent of any notion of returning home.

How a medical evacuation unfolds

• Initial medical assessment: a coordinating physician gathers the patient's file (diagnosis, current treatment, required equipment) from the on-site care team.
• Choosing the mode of transport: a dedicated air ambulance, a commercial flight with medical escort, or ground ambulance, depending on distance, urgency and the patient's condition.
• Assembling the medical crew: physician, nurse, and where needed, on-board critical-care equipment (ventilator, monitor, infusion pumps), matched to severity.
• Bed-to-bed coordination: ground transport organized at both ends and admission arranged at the receiving facility, so the family has no logistics to manage.
• Handover: a complete clinical handover to the receiving medical team on arrival.

Who decides, and who pays?

A medical evacuation is generally decided jointly by the treating physician on site and a coordinating physician, based on the patient's condition and the feasibility of transport. Financial coverage depends on the patient's travel insurance or assistance contract; without coverage, it can be organized directly by the family.

Come across a term you don't recognize — bed-to-bed, Sea Level Flight, fitness to fly? Our air ambulance & EVASAN glossary defines them all in plain language.

General information only — not personalized medical advice. Always confirm with the patient's treating physician before making a travel decision.