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Erschienen in:
2020 | OriginalPaper | Buchkapitel
Bioimpedance Technology for Assessing Blood Filling Redistribution in Human Body Regions During Rotation on Short Radius Centrifuge
verfasst von : Svetlana P. Shchelykalina, Milena I. Koloteva, Yulia V. Takhtobina, Yuri I. Smirnov, Alexander V. Smirnov, Galina Yu. Vassilieva, Dmitry V. Nikolaev
Erschienen in: 17th International Conference on Electrical Bioimpedance
Verlag: Springer Singapore
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Abstract
Space microgravity lead to changes in the functioning of most human organs and systems, including cardiovascular. Installation of a complex with a gravitational training effect (for example, a short-radius centrifuge (SRC)) on board a spacecraft may be a solution to this problem.
Aim of the work: to assess the possibilities of the polysegment bioimpedance method for monitoring the blood filling redistribution in body regions during rotation on a SRC.
Materials and methods
Nine healthy male volunteers aged 25–40 years participated in three SRC rotation modes (twice 60 and once 45 min). Each mode on the SRC consisted of three phases with uniform acceleration up to values of 0.2 g, 1.05 g and 2 g/2.4 g/2.9 g and of three phases with uniform deceleration. The relative change in resistance at a probing current frequency of 5 kHz was assessed using the bioimpedance analyzer in the polysegment mode.
Results and discussion
21 complete records were registered, and 4 records were incomplete, i.e. the study was terminated for medical reasons. The electrical resistance of the head and thorax regions during the SRC rotation maximally increased by +16% and +23%, indicating a decrease in blood filling, while the electrical resistance of the leg regions decreased by –17%.
The blood outflow from the head and the flow to the legs did not depend on the SRC rotation mode during first 30 min, and was expressed in average changes by +10% in the head and −15% in the legs.
Conclusion
The method is good for recording the fluid redistribution during rotation on a SRC and can later serve as an instrumental basis for diagnosing and predicting syncopal states.