The method of delivering chest compressions remains the same, as does the rate (at least 100 per minute). It is hoped that the use of compression-only delivery will increase the chances of the lay public delivering CPR.
Much like when crack your knuckles, loud popping noises from your knees are most likely caused by what is called cavitation. Cavitation results from a change in joint pressure that allows carbon dioxide, which is normally dissolved in your joint fluidâa.k.a.
Causes of Crepitus or Joint Popping. Often, crepitus is harmless. It happens when air seeps into the soft tissues around the joint (such as the kneecap). When you bend the joint, the air bubbles burst, and you hear a cracking sound. While most crepitus is harmless, some forms of crepitus signal a problem.