TT imatanthauza nthawi yothira magazi pambuyo powonjezera thrombin yokhazikika mu plasma. Mu njira yodziwika bwino yothira magazi, thrombin yopangidwa imasintha fibrinogen kukhala fibrin, yomwe imatha kuwonetseredwa ndi TT. Chifukwa fibrin (proto) degradation products (FDP) imatha kukulitsa TT, anthu ena amagwiritsa ntchito TT ngati mayeso owunikira dongosolo la fibrinolytic.