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.
Popping and cracking sounds usually aren't signs that something's wrong. âA lot of joints crack and the knees are a really common joint to crack,â says David McAllister, MD, director of the UCLA's Sports Medicine Program. âMost people have knees that crack when they squat down or go through the full arc of motion.