СИСТЕМА ГЕМОКОАГУЛЯЦИИ В НАЗЕМНЫХ ЭКСПЕРИМЕНТАХ, МОДЕЛИРУЮЩИХ ЭФФЕКТЫ КОСМИЧЕСКОГО ПОЛЕТА: ПО МАТЕРИАЛАМ РОССИЙСКИХ ИССЛЕДОВАНИЙ

Abstract

The review presents the results of studying the hemocoagulation system in Soviet and Russian experiments modeling effects of some spaceflight factors on the human organism. The most adequate models of microgravity are head-down bed rest (BR) and immersion. Effects of g-loads were reproduced by rotation on a centrifuge. In the course of these experiments, the procoagulant, anticoagulant and fibrinolytic activities displayed different trends and dependence on the period of locomotion reduction. In immersion, the procoagulant activity increased, fibrinolytic activity decreased and the anticoagulant potential changed in the either direction. Some data suggest that hypergravity increases the anticoagulant and fibrinolytic activities on the background of hypocoagulation; however, there are also other data suggesting the contrary, i.e. hypergravity leads to hypercoagulation and activation of fibrinolysis. According to investigators, the combination of gravitational loads and limited locomotion decreases the procoagulant activity and increases the fibrinolytic one. Discrepancy between the post-flight and ground-based data is attributed to the impossibility to reproduce in laboratory all the factors that act on the human organism in space flight.