What correct compression depth should be achieved during CPR?

The correct compression depth to achieve during CPR is between 5-6 cm. This depth is crucial as it ensures adequate circulation of blood to vital organs, especially the heart and brain. Compressions that are too shallow may not generate enough pressure to effectively pump blood, leading to decreased chances of survival for the victim.

Research and guidelines from notable organizations like the American Heart Association emphasize that compressions should be performed hard and fast, at a rate of 100 to 120 compressions per minute, with this specific depth requirement in mind. Achieving this depth helps create sufficient intrathoracic pressure to push blood out of the heart and into the rest of the body. Additionally, compressions should allow for complete recoil of the chest between compressions to maximize blood flow.

In the context of the other options, depths like 2-3 cm or even 1-2 cm would not provide the necessary volume displacement needed to circulate blood effectively, while 7-8 cm is deeper than recommended and could potentially cause injury to the victim's chest. The emphasis on the correct depth, therefore, lies in its balance; too shallow and it fails to function, too deep and it risks harm. The established guideline of 5-6 cm strikes this