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.
Q: Why does my knee crack and pop during leg exercises? A: Popping and cracking sounds are common with movements that involve bending or twisting. Concern is only when the popping and cracking sounds occur with pain. Your bones are covered with cartilage that allows them to move smoothly against each other. Training and being active over the years can create incongruencies in the cartilage leading to irregular gliding of your bones, creating this crepitus sound.