Table 2 Quality of CPR achieved with the study device CPR.com and the standard equipment

Hands-off time (%)

24.5 (23.3 to 25.6)

23.5 (22.3 to 24.6)

1.0 (−0.4 to 2.5)

0.156

Time interval until the first defibrillation (s)

70.3 (64.7 to 75.9)

75.1 (69.4 to 80.8)

−4.8 (−12 to 3)

0.204

Time interval until the second defibrillation (s)

214 (107 to 221)

215 (209 to 222)

−1 (−11 to 8)

0.786

Time interval until the third defibrillation (s)

355 (347 to 364)

352 (343 to 361)

3 (−8 to 14)

0.574

Time interval until intubation of the mannequin with the LT (s)

129 (113 to 146)

121 (104 to 137)

9 (−11 to 28)

0.368

Time interval until the implementation of venous access (s)

305 (290 to 320)

304 (289 to 320)

1 (−21 to 22)

0.946

Time interval until the administration of adrenaline (s)

380 (369 to 392)

403 (391 to 416)

−23 (−37 to −8)

0.003

Time interval until the administration of amiodarone (s)

427 (416 to 438)

444 (432 to 457)

−17 (−31 to −3)

0.016

Number of CC per minute (n)

79 (75 to 82)

82 (78 to 85)

−3 (−5 to −0.4)

0.022

Frequency of CC [min⁻¹] (n)

105 (100 to 109)

107 (102 to 111)

−2 (−5 to 0)

0.068

Number of ventilations per minute (n)

6.9 (6.3 to 7.5)

8.7 (8.1 to 9.3)

−1.8 (−2.6 to −1.0)

<0.001

Number of changes of the person doing chest compressions (n)

2.7 (2.5 to 2.9)

2.1 (1.9 to 2.3)

0.6 (0.3 to 0.8)

<0.001