PARAMETERS OF BLOOD FLOW IN ARTERIES AND VEINS OF THE PELVIS AND LOW EXTREMITIES AT PHYSIOLOGICAL PREGNANCY AND THREAT OF PREMATURE DELIVERY

Purpose: To analyze character of arterial and venous blood flow in pelvis and low extremities at normal and complicated pregnancy.

Methods and Materials: Doppler examinations of the both external and internal iliac arteries, uterine and femoral arteries, and femoral veins were performed in 65 women with physiological pregnancy and in 84 women with threat of premature delivery in II and III trimesters.

Results: It was found, that at progression of physiological pregnancy the gradual decrease in velocity of blood flow in all groups of vessels occur (with prevalence vasospasm at the right side). At threat of premature delivery 1) the symmetry of parameters of S/D ratio in arteries and maximal velocity of venous blood flow at the both sides was registered, 2) increase of vasospasm by the end of pregnancy was found. Mean values of parameters of arterial and venous blood flow in complicated pregnancy were 1.3 times higher than in physiological pregnancy. We have found that the intensity of blood flow in left hemodynamic contour influenced significantly at rate of fetal growth. Decrease in intensity of arterial and venous blood flow in the left low extremity in pregnant women with threat of premature delivery was accompanied by signs of intrauterine growth restriction. Severe disturbances of blood flow in the uterus-placenta-fetus complex in 70% of cases were accompanied by insufficiency of valves of femoral veins.

Conclusions: Obtained results demonstrate that level of blood flow in the uterus-placenta-fetus complex depends on level blood flow in low extremities.