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.
Other injuries that can lead to knee swelling include cartilage or meniscus tears, and knee overuse, which may lead to irritation, states Mayo Clinic. Conditions that can give rise to swollen knees include bursitis, osteoarthritis, rheumatoid arthritis, tumors and infections. Cysts, gout and pseudogout may as well cause knees to swell. Risk factors for swollen knees include advanced age and obesity, explains Mayo Clinic.