Basing on the fact that the digest products derived from fibrinogen were heat-labile, while those from fibrin were heat-stable, the techniques of differentiation between fibrinogenolytic state and intravascular coagulation with or without secondary fibrinolysis were presented by employing the thrombin clotting time and the immune assays. These techniques were indicated on 6 cases of obstetrical hemorrhage due to coagulation anomalies.
A large amount of heat-labile digest products which might be derived from fibrin, the lowered levels in fibrinogen, Factor V and plasminogen were demonstrated in 3 of 6 cases, suggesting the patients as having hypofibrinogenemia due to intravascular coagulation with secondary fibrinolysis.
Another case showed the almost same results with exception of fibrinogen level.
Neither fibrinogen split products nor fibrin ones was detected in 1 of 6 cases, in spite of the lowered levels in platelets, fibrinogen, Factor V and plasminogen. This might indicate the hypofibrinogenemia was pure defibrination type.
In the last case, a marked fibrinolytic activity was demonstrated on the thrombelastography, but her coagulation factors were entirely normal. The hemorrhage might be a results of thrombolysis which occurred in the injured vessels of the uterus.
From the etiological view point, the indication and contraindication of antiplasmin therapy on the varieties of obstetrical hemorrhage were discussed.
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