Some features of the hemostasis system in pregnant women at risk of developing preeclampsia

Abstract

The objective: a study of the hemostasis system in pregnant women with a risk of preeclampsia development.Materials and methods. 100 pregnant women with the risk for preeclampsia (main group) were examined. The risk factors were determined according to the Guideline “Hypertensive Disorders During Pregnancy”, Order No. 676 of the Ministry of Health of Ukraine. The control group contained of 50 healthy women with physiological pregnancy. The groups were representative in age and reproductive history.The following indicators of hemostasis were studied: the platelet system (the number of platelets, their aggregation ability and the total platelet aggregation index (TPAI), the coagulation system (autocoagulation test, thrombin time, prothrombin index, fibrinogen concentration) and the state of the fibrinolysis system which was determined by such indicators: plasma level of free heparin, activity of antithrombin III, indicators of ethanol and protamine sulfate tests, concentration of soluble fibrin in blood plasma.Results. In pregnant women with a risk of preeclampsia, there are changes in platelet hemostasis indicators: a significant decrease in the number of platelets and a significant (p<0.05) increase in platelet aggregation ability, there is a tendency to an increase in TPAI indicators. In the main group a significant increase in the fibrinogen concentration, plasma lysis indicators and a tendency to an increase of the free heparin concentration, a decrease of antithrombin III and, in comparison with the indicators in healthy women, a 3-fold increase in the content of soluble fibrin (p<0.05) were found.Conclusions. In pregnant women with a risk of preeclampsia development, there are disorders in the vascular-platelet hemostasis, coagulation and fibrinolytic blood systems, namely, a significant tension in the platelet link of the system, an increase in thrombogenic potential, and a sharp inhibition of the fibrinolytic link of hemostasis.