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.
The joints of the body that often make a cracking or popping sound include the knuckles, the back and neck, the knees, ankles, and elbows. Sometimes the joints crack audibly and other times you may feel it without hearing a sound.