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.
A Tear in Your Cartilage. One of the most common reasons for knee buckling is a tear in the cartilage rings surrounding your knee, called the menisci. When your cartilage tears, you may find that your knee is unstable especially when going down the stairs or squatting down to pick something up.