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.
Popping Knees and Crackling Knuckles. Occasionally hearing pops, snaps, and crackles when you bend your knees doesnât necessarily mean you have arthritis. (Other joints might make these noises now and then too.) However, it is common in those with the condition. Doctors call this sound âcrepitusâ (KREP-ih-dus).