Wearable optical devices for investigation of the reaction of cosmonauts microcirculatory-issue systems to the effects of simulated spaceflight factors

Abstract

Spaceflight factors (SFF) exert a complex influence on the human body, leading to functioning changes of various physiological systems. Under Earth’s gravity, the preparation of cosmonauts for space missions involves simulating SFF, such as hypoxia and hypobaria exposure, vestibular impacts, overloads exposure and orthostatic effects. This study presents the results of evaluating the effects of these factors on the microcirculatory and tissue systems of professional cosmonauts.
This study presents an evaluation of simulated SFF on the microcirculatory-tissue systems (MTS) of professional cosmonauts. Continuous monitoring of MTS parameters was performed before, during, and after exposure, using a distributed system of four wearable optical devices based on laser Doppler flowmetry and fluorescence spectroscopy.
The study involved cosmonauts of the Roscosmos Cosmonaut Corps, with all measurements conducted at the Yu.A. Gagarin Research and Test Cosmonaut Training Center. Overloads exposure were simulated using centrifuges (18 m and 7 m radius). Automated electrically driven tilt table was used to orthostatic effects. Vestibular impacts simulated with a rotating chair. For hypoxia modeling was used altitude chamber.
The results obtained make it possible to identify individual mechanisms of adaptation to each of the SFF, which indicates a high degree of preparation of the body and its sensitivity to local hemodynamic needs. The use of registration of MTS parameters under the influence of simulated SFF will lay the foundations for a personalized approach to cosmonauts training.
The work was carried out with the financial support of the Russian Science Foundation (project no. 25-25-00546).

Speaker

Loktionova Yulia
Orel State University named after I.S. Turgenev, Russia, Orel
Russia

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