  One of the main characteristics of blood coagulation is the speed of clot
growth. This parameter strongly depends on the speed of propagation of the
thrombin concentration in blood plasma. In the current work we consider
mathematical model of the coagulation cascade and study the existence,
stability and speed of propagation of the reaction-diffusion waves of blood
coagulation. We also develop a simplified one equation model that describes the
main features of the thrombin wave propagation. For this equation we estimate
the wave speed analytically. The resulting formulas give a good approximation
for the speed of wave propagation in a more complex model as well as for the
experimental data.
