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Hypobaric Atmosphere as a Prophylactic Measure Against Decompression Sickness During Repetitive EVA
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Abstract
The risk of decompression sickness (DCS) inherent in extra-vehicular activity (EVA) is reduced through the usage of hypobaric normoxic atmosphere. The safety of decompression protocols was evaluated during EVA simulation in the PCC-270 pressure chamber complex according to DCS frequency and tissue supersaturation ratio. The test program included 15 man rated test runs (1828 man- runs) with 123 test subjects aged 19-54. The aim of the test program was to select decompression safe protocols for transfer from hypobaric environment to a reduced pressure mode in the Russian space suit.
These experiments allowed to display in nomogramm form the ratio of operative pressure mode in the extravehicular space suit to the duration of a preliminary exposure in normoxic hypobaric conditions. Two other nomogram allowed to estimate variants of the compatible atmosphere parameters (total pressure, nitrogen partial pressure, oxygen content) and allowable value of the space suit pressure for denitrogenation-free egress without oxygen prebreathing.
This paper presents experimental data base to verify safety of repetitive EVA sorties from the orbital space stations.
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Chadov, V., Filipenkov, S., and Isseev, L., "Hypobaric Atmosphere as a Prophylactic Measure Against Decompression Sickness During Repetitive EVA," SAE Technical Paper 972317, 1997, https://doi.org/10.4271/972317.Also In
References
- 1972
- 1975
- 1964
- 1968 7
- 1975 T 3
- 1974
- 1980
- 1975 T
- 1979
- 1994 T
- 1978 1979
- 1977
- 1983
- 1937
- 1979 157 162
- 53 58
- Chadov V.I. Isseev L.R. Filipenkov S.N. Assessment of the atmospheric parameters of the space craft and space suit ensuring decompression safety during episodic extra-vehicular activity SAE Tech. Paper series N961419 1996 10
- Abramov I.P. Stoklitsky A. Yu. Barer A.S. Filipenkov S.N. Essential aspects of space suit operating pressure trade-off SAE Tech. Paper Ser. N941330 1994 9
- Hills B.A. Compatible atmospheres for a space suit, space station, and shuttle based on physiological principles Aviat. Space Environ. Med. 1985 56 11 1052 1058
- McBarron J.W. II U.S. Prebreathe protocol Acta Astronautica 32 1 75 78