What should the captain ascertain before making an unscheduled landing due to a medical emergency?

Before making an unscheduled landing due to a medical emergency, it's crucial for the captain to ascertain the adequacy of medical facilities at the airport. This is essential because the primary concern during such emergencies is to ensure that the passenger receives timely and appropriate medical care upon landing. Knowing that the airport has well-equipped medical services assures the captain that they can effectively manage the situation once the aircraft arrives on the ground.

While other factors like the availability of in-flight medical personnel and the passenger's medical history are important, they do not hold the same level of urgency in determining the appropriateness of the landing destination. Ensuring that there are adequate medical facilities at the intended airport takes precedence, as it directly impacts the health and safety of the individual experiencing the medical emergency. Reporting this information allows the flight crew to make informed decisions and ensures that the necessary resources are available upon arrival.