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.
At the moment your joints pop, you may wonder exactly what is causing it. It's not an uncommon phenomenon. Generally, it is considered normal and nothing to be concerned about, especially if it occurs infrequently and without pain. It can be hard to pinpoint what is causing the popping sensation. There are a few possible causes of popping. It is believed that ligaments can cause the sensation as they tighten when a joint moves. It also can be related to a tendon snapping around a joint. Popping joints can also be due to rough joint surfaces from cartilage loss and osteophytes associated with osteoarthritis.