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A New, Ideal Technique to Monitor Thrombolytic Therapy

Department of Pharmacology, King's College, Strand, London, England

In an earlier article we have reported a technique which allows the measure ment of haemostasis from whole blood by the "tube bleeding" principle. The technique is now progressed by using non-anticoagulated blood and therefore clotting-time is also measured. We report here that the technique allows a sim ple thrombolytic assay to perform from the same blood sample used for haemo stasis measurement by detecting the length of time until the haemostatic plugs crack or are expelled. Evidence is presented that this "spontaneous" expulsion is mainly due to thrombolysis. Generation of thrombin during haemostasis is indicated by the inhibitory effect of hirudin. ¹²⁵I-fibrinogen accumulates (28- fold) in the haemostatic plugs. Plasminogen activators (streptokinase and uro kinase) reduce while inactivation of plasminogen by specific antibody greatly prolongs the expulsion-time. The effect of cytochalasin B shows that the retrac tion of the haemostatic plug is not a decisive factor of the expulsion. As the technique allows the simultaneous measurement of haemostasis, thrombolysis and clotting, it seems ideal for monitoring thrombolytic therapy.

Angiology, Vol. 37, No. 2, 99-105 (1986)
DOI: 10.1177/000331978603700205


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