NTRS - NASA Technical Reports Server

Back to Results
Pulmonary function evaluation during the Skylab and Apollo-Soyuz missionsPrevious experience during Apollo postflight exercise testing indicated no major changes in pulmonary function. Pulmonary function has been studied in detail following exposure to hypoxic and hyperoxic normal gravity environments, but no previous study has reported on men exposed to an environment that was both normoxic at 258 torr total pressure and at null gravity as encountered in Skylab. Forced vital capacity (FVC) was measured during the preflight and postflight periods of the Skylab 2 mission. Inflight measurements of vital capacity (VC) were obtained during the last 2 weeks of the second manned mission (Skylab 3). More detailed pulmonary function screening was accomplished during the Skylab 4 mission. The primary measurements made during Skylab 4 testing included residual volume determination (RV), closing volume (CV), VC, FVC and its derivatives. In addition, VC was measured in flight at regular intervals during the Skylab 4 mission. Vital capacity was decreased slightly (-10%) in flight in all Skylab 4 crewmen. No major preflight-to-postflight changes were observed. The Apollo-Soyuz Test Project (ASTP) crewmen were studied using equipment and procedures similar to those employed during Skylab 4. Postflight evaluation of the ASTP crewmen was complicated by their inadvertent exposure to nitrogen tetroxide gas fumes upon reentry.
Document ID
Document Type
Reprint (Version printed in journal)
Sawin, C. F. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Nicogossian, A. E. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Rummel, J. A. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Michel, E. L. (NASA Johnson Space Center Biomedical Research Div., Houston, Tex., United States)
Date Acquired
August 8, 2013
Publication Date
February 1, 1976
Subject Category
Distribution Limits