Safe EMS
I humbly think that twin engines, two pilots, pilots decision not influenced by medic crew information , highly experienced pilots, well equipped helicopters, safe culture, are the response to avoid accidents. For some reason the HEMS accident rate in Europe is much lower than in the US. A medical emergency is allways an emercency even if you want to call it another name, wanting to rush to save lives is normal, but none of this as to interfere with pilots decision making, for a safe flight.