Fig. 4

Detailed analysis of first responder activations through the KATRETTER system over time. Note: Because of a high number of false positive activations we deleted the Code 31D02 “Severe respiratory distress” from the list of dispatch codes which prompt automatic CFR activation in the dispatch system (see Table 1) on February 1st, 2022. This is the reason for the decrease of activations during that timeframe seen in this figure