[Fast diagnostics in the emergency department: Laboratory testing - what we need and what we don't].

Laboratory parameters in emergency medicine can be divided into 3 categories. Urgent obligatory parameters are necessary for immediate therapeutic decisions and must be available within 60 minutes. For these, testing in the emergency department (ED) as point-of-care-testing (POCT) should be considered. The second category are obligatory parameters which require diagnostic / therapeutic consequences in the emergency department, but are not necessary for immediate life-saving actions. Due to international consensus of a 4-hour length of stay target for ED, results should be available within this time. The third category are parameters which do not lead to immediate diagnostic or therapeutic consequences, but are important for process management and patient flow in the ED. They should therefore be available as emergency tests. POC-testing should be used for a limited number of very urgent parameters and should be organized as a satellite laboratory in cooperation with the central laboratory.