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.
Popliteus Injury. The Popliteus is a small muscle located at the back of the knee joint. An injury or strain to the muscle or tendon can cause pain at the back of the knee.ymptoms of a popliteus injury include pain at the back of the knee joint. There will be tenderness when pressing in at the back of the knee. Pain will be reproduced when the knee is bent against resistance whilst the lower leg or tibia bone is rotated outwards. Athletes with this injury commonly have tight hamstrings.