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Decompression sickness in simulated Apollo-Soyuz space missionsApollo-Soyuz docking module atmospheres were evaluated for incidence of decompression sickness in men simulating passage from the Russian spacecraft atmosphere, to the U.S. spacecraft atmosphere, and then to the American space suit pressure. Following 8 hr of 'shirtsleeve' exposure to 31:69::O2:N2 gas breathing mixture, at 10 psia, subjects were 'denitrogenated' for either 30 or 60 min with 100% O2 prior to decompression directly to 3.7 psia suit equivalent while performing exercise at fixed intervals. Five of 21 subjects experienced symptoms of decompression sickness after 60 min of denitrogenation compared to 6 among 20 subjects after 30 min of denitrogenation. A condition of Grade I bends was reported after 60 min of denitrogenation, and 3 of these 5 subjects noted the disappearance of all symptoms of bends at 3.7 psia. After 30 min of denitrogenation, 2 out of 6 subjects developed Grade II bends at 3.7 psia.
Document ID
19740041935
Document Type
Reprint (Version printed in journal)
Authors
Cooke, J. P.
Robertson, W. G. (USAF, School of Aerospace Medicine, Brooks AFB Tex., United States)
Date Acquired
August 7, 2013
Publication Date
March 1, 1974
Publication Information
Publication: Aerospace Medicine
Volume: 45
Subject Category
BIOTECHNOLOGY
Report/Patent Number
AD-776829
SAM-TR-73-287
Funding Number(s)
CONTRACT_GRANT: NASA ORDER T-82170
Distribution Limits
Public
Copyright
Other