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Hematological changes following repetitive decompressions during simulated extravehicular activity

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Summary

A study was performed to evaluate decompression procedures suggested for use prior to Space Shuttle extravehicular activity. Hematological parameters were measured in 12 male human subjects before and after exposure in an altitude chamber to a 3-day staged decompression schedule, with simulated extravehicular activity. Following the exposure, significant increases occurred in white blood cell count and activated partial thromboplastin time, and platelet aggregate ratio was significantly decreased. Pre-exposure samples from subjects who were susceptible to formation of venous gas emboli (VGE) exhibited a significantly lower degree of ADP-induced platelet aggregation and a significantly higher amount of lymphocyte blastogenic transformation in response to the mitogen phytohemagglutinin than samples from VGE-resistant subjects. The results indicate that, following this decompression profile, small but significant changes occur in several hematological parameters, and that levels of certain parameters may be related to susceptibility to VGE formation during decompression.

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Authors and Affiliations

  1. Medical Sciences Division, National Aeronautics and Space Administration —Johnson Space Center, 77058, Houston, Texas, USA

    James R. Jauchem, James M. Waligora, Gerald R. Taylor, David J. Horrigan Jr. & Philip C. Johnson Jr.

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  1. James R. Jauchem
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  2. James M. Waligora
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  3. Gerald R. Taylor
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  4. David J. Horrigan Jr.
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  5. Philip C. Johnson Jr.
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Jauchem, J.R., Waligora, J.M., Taylor, G.R. et al. Hematological changes following repetitive decompressions during simulated extravehicular activity. Int. Arch Occup Environ Heath 58, 277–285 (1986). https://doi.org/10.1007/BF00377885

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  • DOI: https://doi.org/10.1007/BF00377885

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