Final answer:
CPR provides chest compressions and artificial respirations to supply oxygen and maintain circulation in cardiac arrest. The specific pattern of 2 breaths before 30 compressions ensures oxygenation and blood flow, particularly to the brain, to improve survival chances. Proper technique and training are vital to effectively perform CPR and minimize injury risks.
Step-by-step explanation:
Cardiopulmonary resuscitation (CPR) involves delivering chest compressions and artificial respirations to a person in cardiac arrest, when the heart is no longer effectively pumping blood. The procedure you described, giving 2 breaths before 30 compressions, is part of a CPR technique that aims to provide both oxygenation and circulation.
Applying pressure to the sternum between the lines at T4 and T9 allows the compression of the heart, pushing blood into the pulmonary and systemic circuits.
This action is essential to maintain blood flow to the brain and other vital organs, as neuronal death occurs within minutes without oxygenation. The process of providing 2 breaths ensures that oxygen is added to the blood circulating around the body, improving the chances of recovery.
The compressions should be at least 5 cm deep and at a rate of 100 per minute. Proper training in CPR is essential to avoid causing injury such as broken ribs, or worse, while attempting to save a life. CPR is usually performed until professional medical assistance arrives and takes over, or the patient shows signs of recovery.