Measurements of dynamic elastic modulus
and loss modulus
of clotting blood and fibrinogen solutions were carried out. When the blood is collected into a siliconized polyethylene test tube, the saturated value of
is smaller and that of
is larger, and the clotting time is longer than those when the blood is collected into a non-siliconized glass tube. In the aqueous solution of fibrinogen added with thrombin, the lower concentration of thrombin yielded the smaller
and the larger
for the clotted gel and the longer clotting time. As the concentration of thrombin is low, the polymerization of fibrin would be impeded by the presence of partly formed gel and the formation of fibrin network would become incomplete. It is supposed that the siliconization of the surface of tube may influence the rate of production and the concentration of thrombin in the blood.
