Background: experimental data indicate that during cardiopulmonary resuscitation (CPR)  continuous chest compressions (CCC) guarantee better coronary and cerebral perfusion, which correlates with neurologically intact survival, as compared to the standard technique of 30 compressions alternating with 2 ventilations (30: 2). On the contrary, clinical studies suggest a greater effectiveness of the 30: 2 technique, but not in all categories of rescuers (professional, non-professional). The use of devices applied to the airways to increase the efficacy of massage and promoting venous return during CCC, have proved useful in experimental and clinical studies.

4 - Cardiac massage with standard technique vs cardiac massage with continuous chest compressions and use of a new device for the airways: study on mannequin in two categories of rescuers.