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/C joint or labrum: Common causes of shoulder popping are spurs on the acromoiclavicular (a/c) joint at the top of the shoulder or a tear of the labral cartilage inside the shoulder joint. Overhead cable pulls working behind the head can aggravate both.