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 sudden (acute) injury may occur from a fall on the hip, a direct blow to the hip or knee, or abnormal twisting or bending of the leg. Examples of acute injuries that may cause a snap, pop, or grating sound or feeling include: 1  A broken hip (hip fracture) or pelvis (pelvic fracture), such as an avulsion fracture.