Partial Thromboplastin Time (PTT) The partial thromboplastin time (PTT) examination also steps the speed of clotting but differs from your PT examination in that it aims to establish how blood clots in a blood vessel (intrinsic pathway). Once activated, the PT exam is calculated in seconds. Time is then compared https://sparedirectory.com/listings559579/5-essential-elements-for-%E4%B9%9D%E5%B7%9E%E5%A8%9B%E6%A8%82%E5%9F%8E