Just did some look-up on that "thing"...
They say its max speed is 120 km/h.
Its endurance (before running out of fuel) is about 8-9 minutes...(lets say 8 for this calculation).
120 km/h for 8 minutes (2 Km/min) equals a maximum distance covered of 16 Km.
Cut that in half (going there and back) makes it 8 Km.
Now take into consideration that-when you go up and down a hill or mountain, you cannot go "max speed"-turns the operational range into something like 6-7 Km around the base (at maximum).
Then again:
The medic/doctor needs to put on the suit (he will not be wearing it sitting around all day on alert, right?), needs to fly there, needs to take the suit off (he cannot work on the patient while wearing smoking hot turbine packs on his hands), and-lets not forget-he will need his medic pack as well.....
So all in all:
Best case would be a 30-minute-notice to move, followed by a flight of (at max!) 6 Km distance from base, followed by another 5-10 minutes taking the suit off.....
Thatīs 45 minutes from alert to "start working on the patient"......
How is that any quicker than an ambulance, or a rescue helicopter?