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Distribution of pulmonary ventilation and perfusion during short periods of weightlessnessAirborne experiments were conducted on four trained normal male subjects (28-40 yr) to study pulmonary function during short periods (22-27 sec) of zero gravity obtained by flying a jet aircraft through appropriate parabolic trajectories. The cabin was always pressurized to a sea-level altitude. The discussion is limited to pulmonary ventilation and perfusion. The results clearly demonstrate that gravity is the major factor causing nonuniformity in the topographical distribution of pulmonary ventilation. More importantly, the results suggest that virtually all the topographical nonuniformity of ventilation, blood flow, and lung volume observed under 1-G conditions are eliminated during short periods of zero gravity.
Document ID
19790034954
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Michels, D. B.
(California Univ. La Jolla, CA, United States)
West, J. B.
(California, University La Jolla, Calif., United States)
Date Acquired
August 9, 2013
Publication Date
December 1, 1978
Publication Information
Publication: Journal of Applied Physiology: Respiratory
Subject Category
Aerospace Medicine
Accession Number
79A18967
Funding Number(s)
CONTRACT_GRANT: NGL-05-009-109
Distribution Limits
Public
Copyright
Other

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