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Table 2 Quality of cardiopulmonary resuscitation (CPR)

From: Quality of cardiopulmonary resuscitation in out-of-hospital cardiac arrest before and after introduction of a mechanical chest compression device, LUCAS-2; a prospective, observational study

CPR variables Manual CPR LUCAS CPR P-value
  n = 155 n = 155  
Episode duration, min. 5 (2; 6) 13 (11; 14) <0.001
No-flow fraction, % 35 (33; 37) 16 (15; 18) <0.001
Chest compression rate per minute 124 (121; 126) 102 (102; 102) <0.001
Number of chest compressions per minute 75 (72; 79) 84 (82; 85) <0.001
  1. No-flow time = Time without ROSC – time without chest compressions.
  2. No-flow fraction = No-flow time/(episode duration – time with ROSC). ROSC = Return of spontaneous circulation.
  3. CPR variables are presented as mean values (95% CI).