Cardiopulmonary resuscitation (CPR) is a recommended emergency procedure for a person who has collapsed with no signs of breathing and pulse. It consists of external cardiac massage and sometimes artificial respiration to maintain the minimum blood circulation and oxygen exchange necessary for survival until help arrives. When CPR is needed outside a hospital, most witnesses are not comfortable performing it due to lack of training or confidence. Furthermore, sustaining the essential survival baseline in an average adult requires continuous compressions of 4 cm in depth and 100 compressions per minute, which is very physically demanding. Without any feedback, even the experienced emergency responders only maintain 40% of their compressions at an adequate level due to fatigue [1].
To mitigate bystanders' hesitation and increase performance awareness in professionals, many CPR aiding devices have emerged over the years. They provide various degrees of guidance and/or feedback in compression position, rhythm,...
