Influence of Heparin and a Low Molecular Weight Heparin Fraction of the Leukocytes in an Experimental Venous Thrombosis Model

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Abstract
A randomized study was performed to observe the effects induced by heparin and a low molecular weight heparin fraction (at different dosages) on the leukocytes of rats in the presence of experimental venous thrombosis. The experimentation was carried out on two series of animals: the first with a ligature of the inferior vena cava inducing the formation of a thrombus, the second without any ligature. The results show that the induction of thrombosis involves: in the blood, an increase of the number leukocytes, principally polymorphonuclear cells; in the thrombi, a significant rise in the total count of leukocytes, here mononuclear cells; the latter number increases with the dosages of the administered drugs.