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.
Direct hits to the knee may cause a sprain. Sprains may be caused by knocks or hits to the front, sides, or back of the knees. Sprains may be caused by tripping and falling onto your knees while they are bent. You can get a sprain from being forcefully knocked to the ground, such as during a football tackle. A sprain may also happen during a car accident.