A Newly Developed Damped Oscillation Type Rheometer

I. Experiments:Application to Measurement of Blood Coagulation

Abstract

A new type of damped oscillation rheometer was developed for the study of biorheology. The rheometer consists of the cylindrical tube suspended from a torsion wire and filled with test liquid. The cylindrical tube may be made of various materials. The tube is excited in torsional oscillation and the subsequent damped oscillation is observed. The apparatus can sensitively follow the change of fluidity of liquid sample. Changes of logarithmic damping factor for blood and fibrinogen solution during coagulation were measured. The change of logarithmic damping factor for blood during coagulation remarkably depended on tube material, suggesting that the present method is probably available for in vitro evaluation of anticoagulability of artificial materials as well as for analysis of coagulation mechanism of blood.