[In vitro studies and model calculations on the kinetics of fibrinolysis with streptokinase].

A method of measuring the distribution kinetics of radioactive 51Cr-EDTA between human plasma and a fibrinoclot are represented. In the presence of streptokinase the speed of distribution is a measure for the progressing of fibrinolysis. The results of measurement as well as the model calculations on the kinetics of fibrinolysis by streptokinase with physiologically relevant data are compared with those observations on the mechanism of thrombolysis obtained from biochemical findings. These results indicate that at the dissolution speeds of the clots observed clinically or experimentally the diffusion of streptokinase activator complexes into the clot seems to play no important role.