TT inoreva nguva yekugwamba kweropa mushure mekuwedzera thrombin yakajairwa muplasma. Munzira yekugwamba kweropa, thrombin inogadzirwa inoshandura fibrinogen kuita fibrin, iyo inogona kuratidzwa neTT. Nekuti fibrin (proto) degradation products (FDP) inogona kuwedzera TT, vamwe vanhu vanoshandisa TT senzira yekuongorora fibrinolytic system.