NTRS - NASA Technical Reports Server

Back to Results
Threshold altitude resulting in decompression sicknessA review of case reports, hypobaric chamber training data, and experimental evidence indicated that the threshold for incidence of altitude decompression sickness (DCS) was influenced by various factors such as prior denitrogenation, exercise or rest, and period of exposure, in addition to individual susceptibility. Fitting these data with appropriate statistical models makes it possible to examine the influence of various factors on the threshold for DCS. This approach was illustrated by logistic regression analysis on the incidence of DCS below 9144 m. Estimations using these regressions showed that, under a noprebreathe, 6-h exposure, simulated EVA profile, the threshold for symptoms occurred at approximately 3353 m; while under a noprebreathe, 2-h exposure profile with knee-bends exercise, the threshold occurred at 7925 m.
Document ID
Document Type
Reprint (Version printed in journal)
Kumar, K. V. (NASA Lyndon B. Johnson Space Center Houston, TX, United States)
Waligora, James M. (NASA Johnson Space Center Houston, TX, United States)
Calkins, Dick S. (Krug International Corp. Technology Life Sciences Div., Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
August 1, 1990
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 61
ISSN: 0095-6562
Subject Category
Distribution Limits