Quality of execution of T-CPR instructions
SECONDARY
Significantly fewer lay rescuers (64.3%) performed a check for breathing in the original wording group in comparison with the specified instruction (92.6%) asking for head tilt-chin lift. In the intervention group the head tilt-chin lift manoeuvre was performed significantly more often and the time duration for check for breathing was appropriate. According to the ERC guidelines the check for breathing including looking, listening and feeling for breathing should take no more than 10 s [The secondary study hypothesis of a prolonged time until start of chest compression with introduction of the modified wording could not be confirmed. The time interval from beginning of the emergency call to start of CPR was significantly longer with original wording (95 ± 33 s.) compared to the specified wording (80 ± 25 s.). Both groups started chest compression earlier than in a corresponding study of the Bavarian telephone resuscitation algorithm 2013 with 202 s [In comparison with the study by Klotz using the Bavarian telephone resuscitation protocol (46/46 = 100%) slightly fewer lay rescuers performed a consciousness check in our study (original wording group: 85.7% vs. intervention group 100%) [It can be noticed that a single lay rescuer who did not remove the clothing had already started CPR before the T-CPR instructions were given. There is no standardised wording for ongoing CPRs in the existing protocol. Hardeland and colleagues analysed data from the emergency dispatch centres of Copenhagen, Stockholm and Oslo and showed, that in cases, where CPR was already initiated, dispatchers were less likely to provide instructions [