This overview demonstrates the lack of uniformity in the use of dispatch criteria for trauma assistance on a national and international level. Furthermore, the activation of HEMS is not only depending on dispatch criterion protocols, but is also influenced by organisational factors like the education of the dispatcher, the training of the EMS personnel, the familiarity with the dispatch criteria, and the responses of bystanders. Future research should aim to identify a general set of criteria with the highest discriminating potential.
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