Figure 3

Tidal volume and number of ventilations. Part a: The mean tidal volume (ml) performed by the ambulance personnel (N = 20). The recommended tidal volume according to guidelines 2005 for resuscitation was 500–600 ml and 10% achieved this. Part b: The total number of ventilations performed by the ambulance personnel (N = 20). In our scenario the optimal number of ventilations was 20.