Effects on Man of 46-Day Life in a Confined Space at Normal Pressure

Paper #:
  • 911533

Published:
  • 1991-07-01
Citation:
Radziszewski, E., "Effects on Man of 46-Day Life in a Confined Space at Normal Pressure," SAE Technical Paper 911533, 1991, https://doi.org/10.4271/911533.
Author(s):
Pages:
10
Abstract:
Six volunteers were selected and submitted at regular intervals throughout a 46-day control experiment in a climatic chamber to a large number of biological investigations (respiratory function, acid-base balance, circulatory function, biochemical determinations on blood and urine specimens) as well as psychomotor tests.The results obtained clearly indicate that two kinds of adaptation occur: the first occurring during the first 2-3 days of confinement essentially marked by a significant increase of urinary volume and electrolyte output; the second, throughout the experiment mainly consists of a slight and progressive decrease of red blood cell count and plasma potassium. Other parameter changes were well within range of the measuring technique's accuracy and physiological background; except for urinary calcium output which still remained elevated.Finally, confinement failed to induce any significant degradation in psychomotor performances in spite of a sensation of fatigue.Such a control experiment provides precise determination of the role played by confinement alone in the observed biological variations during submarine and space missions.
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