作者单位:Department of Anaesthesiology, Institute for Experimental Medical Research, Oslo University[1]University of Oslo, Faculty Division OUH and Ambulance Department, Oslo University Hospital, PB[2]Department of Anaesthesiology, Oslo University Hospital, PB 4956 Nydalen, N-0424 Oslo, Norway[3]Department of Anaesthesiology, National Centre for Prehospital Emergency Medicine, Oslo University[4]