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.
In most joints, pain that accompanies the sound of a pop or a crack is a symptom of arthritis. It is common for arthritic pain to manifest itself without any sound from the joint on movement. A popping sound is also a common contemporaneous event with a serious rupture of a ligament or a tendon.