We have ear defenders and staff inside and monitoring visible in both locations -- anaesthetic machine in the control room. There's not much you can safely do

We have ear defenders and staff inside and monitoring visible in both locations -- anaesthetic machine in the control room. There's not much you can safely do in the fringe field but you can do CPR and rapidly get someone out of the room (and before my spinal injury I used to practice both of those regularly, particularly when part of a team scanning patients with inotropes)