... danger possibleNACA 5 Acute vital (life threatening) dangerNACA 6 Acute cardiac or respiratory arrestNACA 7 DeathZakariassen et al. Scandinavian Journal of Trauma, Resuscitation and Emergency ... medical problem wasclassified (table 2).The NACA score system was chosen because it iseasy to use retrospectively and the air ambulances useZakariassen et al. Scandinavian Journal of Trauma, ... erik.zakariassen@isf.uib.no1National Centre for Emergency Primary Health Care, Uni Health, Bergen,Norway, Kalfarveien 31, 5018 Bergen, NorwayZakariassen et al. Scandinavian Journal of Trauma,...