Final answer:
CPR is an emergency technique that involves manually compressing the heart to maintain blood flow. Proper training and technique are crucial for effective CPR. Mechanical piston devices do not show any benefit compared to manual chest compressions.
Step-by-step explanation:
CPR, which stands for cardiopulmonary resuscitation, is an emergency technique used to maintain blood flow and oxygenation in a patient whose heart has stopped. It involves applying pressure to the sternum to manually compress the heart and push blood into the circulation. Proper positioning and technique are crucial to ensure effective CPR.
Medical personnel, as well as concerned members of the public, should receive proper training and certification in CPR to perform high-quality chest compressions. It is important to note that the use of mechanical piston devices for chest compressions versus manual chest compressions has not demonstrated a benefit in patients with cardiac arrest.