We investigated the incidence of PE (Pulmonary Embolism)and DVT (Deep Vein Thrombosis) after THA by the use of MDCT (multi-detect or row CT scan). The purpose of this study was to evaluate the meaning of blood coagulation molecular markers (FDP D-dimer, Soluble Fibrin Monomer Complex) for the prospect of PE and DVT after THA.

We studied 30 THA patients. There were 2 men and28 women. The value of D-dimer and SFMC before and after THA was examined. MDCT was carried out for DVT and PE investigation, in all cases 7 days after-THA. The relation between the values of blood coagulation molecular markers and existence of PE and DVT was evaluated.

PE occurred in 2 cases and DVT in 4 cases out of 30 cases. D-dimer values of these 2 PE cases in 7 days after THA were higher (18,39), compared with average values (12). Among DVT 4 cases, in 1 case DVT existed on thigh and in other 3 cases existed on calf. The SF values in 7 days showed extremely higher in only thigh DVT case (99), compared with average values (16.6). The value of SFMC fell down rapidly in a few days, representing the biphasic property.

MDCT is very effective for the diagnosis of PE and DVT. But it is difficult to make examination many times. It is very convenient to be able to evaluate PE and DVT by blood examination. From the results of this study, D-dimer may be sensitive for the diagnosis of PE and SFMC also may be useful for DVT. SFMC reacts more rapidly to abnormalities of thrombus and hemostasis. So it has possibilities to clarify the temporal responses of the DVT and PE more precisely.