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

From: Effect of an interactive cardiopulmonary resuscitation assist device with an automated external defibrillator synchronised with a ventilator on the CPR performance of emergency medical service staff: a randomised simulation study

  CPR.com device Standard equipment Difference between the equipment p-value
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
  1. Results are adjusted for the effect of the number of cumulative prior CPR trainings of a rescuer team and presented as means with 95% confidence intervals (95% CI)
  2. Hands-off time: percentage of time without chest compressions during the entire CPR time
  3. LT Laryngeal tube; CC chest compressions