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.
Knees, ankles, fingers and shoulders can all make cracking or popping noise from time to time. While it may sound like something is terribly wrong with the joint, in most cases joint noise is nothing to worry about.