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.
The same movement with a bit more weight on the joint, changes the volume more quickly so it happens.. Muscle tightness in the neck can also cause these pops: As you try to turn your neck, there is resistance, which builds up pressure in the joint and then the joint moves suddenly and creates a pop..