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Ventilation distribution and chest wall mechanics in microgravityThe effect of gravity on lung ventilation distribution and the mechanisms of the chest wall were investigated. The following tests were performed with the respiratory monitoring system of the Anthorack, flown onboard Spacelab D2 mission: single breath washout (SBW), multiple breath washout (MBW) and argon rebreathing (ARB). In order to study chest wall mechanisms in microgravity, a respiratory inductive plethysmograph was used. The SBW tests did not reach statistical significance, while the ARB tests showed that gravity independent inhomogeneity of specific ventilation is larger than gravity dependent inhomogeneity. In which concerns the chest wall mechanisms, the analysis on the four astronauts during the normal respirations of the relaxation maneuver showed a 40 percent increase on the abdominal contribution to respiration.
Document ID
19980006336
Acquisition Source
Johnson Space Center
Document Type
Other
Authors
Paiva, M.
(Free Univ. Brussels, Belgium)
Wantier, M.
(Free Univ. Brussels, Belgium)
Verbanck, S.
(University Hospital Brussels, Belgium)
Engel, L. A.
(Westmead Hospital Sydney, Australia)
Prisk, G. K.
(California Univ. San Diego, CA United States)
Guy, H. J. B.
(California Univ. San Diego, CA United States)
West, J. B.
(California Univ. San Diego, CA United States)
Date Acquired
August 17, 2013
Publication Date
July 1, 1997
Subject Category
Aerospace Medicine
Funding Number(s)
CONTRACT_GRANT: NAS9-16037
CONTRACT_GRANT: NAS9-17884
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
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