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Fluid shifts in weightlessnessStudies of leg volumes in space by multiple girth measurements showed reductions of 1.9 l (12.8 percent of leg volume), with 1.1 l from the nondominant leg, on Skylab 4. On landing, 65 percent of postflight leg volume increase was complete at 1.5 h. Measurement of the dominant leg during the equivalent period on Shuttle showed a mean loss of 0.9 l which was 90-percent complete at 150 min. Postflight increases were 87-percent complete at 1.5 h postlanding. Mass measurements during and after Skylab 4 showed a loss of 2.5 kg over the first 4 d on orbit, with a gain of 2.7 kg over the first 4 d of recovery. These changes are assumed to be tissue fluids secondary to changes in hydrostatic pressures and are much greater than those seen in bed rest. Rate and magnitude of inflight and postflight changes have significant operational impact.
Document ID
19880025739
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Thornton, William E.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Moore, Thomas P.
(NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Pool, Sam L.
(NASA Johnson Space Center Houston, TX; Methodist Hospital of Indiana, Indianapolis, United States)
Date Acquired
August 13, 2013
Publication Date
September 1, 1987
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 58
ISSN: 0095-6562
Subject Category
Aerospace Medicine
Accession Number
88A12966
Distribution Limits
Public
Copyright
Other

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