Automated and app-based activation of first responders for prehospital cardiac arrest: an analysis of 16.500 activations of the KATRETTER system in Berlin

Table 1 Automatically generated dispatch codes prompting first responder activation and similar excluded codes

	Code with suffix	Description
Automated first responder activation	09D01	Cardiac arrest—ineffective breathing
	09E01	Cardiac arrest
	09E02	Cardiac arrest—unknown if breathing
	11D02C	Altered mental status following aspiration event
	11E01 any suffix	Respiratory arrest after airway obstruction
	12D01/12D03	Cardiac arrest after seizure
	14E01 any suffix	Cardiac arrest after drowning accident, patient no longer in water
	23E01/23D01 any suffix	Cardiac arrest after overdose/poisoning
	31E01/31D01^a	Cardiac arrest—ineffective/Agonal respiration
Excluded	03D01	Cardiac arrest after animal bite/attack
	04D01 any suffix	Cardiac arrest after bodily injury
	07D02 any suffix	Cardiac arrest after burn/scald
	09D02 any suffix	Probable dead person
	09E01	Cardiac arrest in newborn (< 30 days)
	09E02	Cardiac arrest—uncertain breathing in newborn (< 30 days)
	09E03	Cardiac arrest—recent hanging
	09E04	Cardiac arrest—strangulation
	09E05	Cardiac arrest—asphyxiation (due to external influence)
	14E02	Cardiac arrest after drowning accident, patient still under water
	15E01 any suffix	Cardiac arrest after electrical accident/lightning strike
	17D02 any suffix	Cardiac arrest after fall
	21D01 any suffix	Cardiac arrest with bleeding
	25D01 any suffix	Cardiac arrest in psychiatric emergency
	29D06	Cardiac arrest after traffic accident
	30D01	Cardiac arrest after injury
	34D03	Automatic accident report, person with respiratory arrest

^aBecause of a high number of false positive activations, we deleted the Code 31D02 during the observational period from the list in February 2022. This is the reason for the decrease of activations in Fig. 4

ISSN: 1757-7241