PLASMA COMPONENT IN THE HEMOSTASIS SYSTEM OF VOLUNTEERS FOR THE EXPERIMENT WITH A SERIES PROPHYLACTIC ROTATION ON A SHORT-ARM CENTRIFUGE

Abstract

We studied the effects on the human system of plasma hemostasis of sequel rotations on a short-arm centrifuge with equal absolute g value and direction. Participants were 6 normal male volunteers at the age of 25 to 45 years. The volunteers were rotated 7 times in the head-to-pelvis direction (+Gz) at 2.1 g. The first rotation was performed prior to the series; the series of 5 rotations was performed with a 2-day interval between each; the final rotation was performed in 14 days after the series. Citrated plasma was used to investigate the procoagulent component of homeostasis, physiological anticoagulents, and intensity of fibrin formation and fibrinolysis. As compared to baseline data, fibrinogen concentration was increased significantly by 4 % on day 7 post rotations; thrombin time was found decreased by 5 % prior to the 6th rotation. Protein C activity was reduced significantly after rotations 3 and 5 by 8 % and 9 %, respectively. Antithrombin III was reduced by 4 % after rotation 5. Concentration of D-dimer was increased after rotations 5 and 6 by 87 % and 32 %, respectively. Rotations produced minor changes in the levels of pro- and anticoagulents, and also in the intensity of fibrin formation and fibrinolysis, that is these changes were within the physiological norm and reflected adaptive processes in organism.