Summary
The action of ellagic acid, serum and acetylsalicylic acid on the frequency of thrombosis
has been studied in a modification of the thrombosis model of Blake et al. (1959).
Thrombi were formed in the external jugular veins of the rats by irritation with a
formalin-methanol solution. The rate of thrombosis is highest with ellagic acid and
lowest with acetylsalicylic acid. None of the groups of treated rats differed significantly
from the control group. A short activation of coagulation with either ellagic acid
or serum does not greatly enhance the thrombosis rate. The action of acetylsalicylic
acid in the prophylaxis of thrombosis is not very convincing. Species differences
may play a role.
Exhaustive coagulation studies before and after operation showed in each group a specific
behaviour of the coagulation factors. There were significant differences between thrombosis
positive and thrombosis negative animals. With ellagic acid, however, there was no
difference between animals with and without thrombosis.