NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Breathing 100 percent oxygen compared with 50 percent oxygen:50 percent nitrogen reduces altitude-induced venous gas emboliThe study investigates effects of 40 zero-prebreathe decompressions of male subjects to 8.3-6.8 psia for 6 h while they were breathing 100 percent oxygen and performing moderate exercise. No decompression sickness (DCS) symptoms were observed. Severe venous gas emboli (VGE) were not detected at 8.3 psia, but were present during 10, 20, and 40 percent of the exposures at 7.8, 7.3, and 6.8 psia, respectively. Zero-prebreathe decompression while breathing 100 percent oxygen results in significantly lower VGE and DCS risk levels than while breathing a 50:50 mix. It is shown that 7.3 psia EVA pressure suits with 100 percent oxygen should be safer than 8.3 psia suits with a 50:50 mix.
Document ID
19940033851
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Webb, James T.
(Krug Life Sciences, Inc. San Antonio, TX, United States)
Pilmanis, Andrew A.
(USAF, Armstrong Lab. Brooks AFB, TX, United States)
Date Acquired
August 16, 2013
Publication Date
September 1, 1993
Publication Information
Publication: Aviation, Space, and Environmental Medicine
Volume: 64
Issue: 9
ISSN: 0095-6562
Subject Category
Aerospace Medicine
Accession Number
94A10506
Funding Number(s)
CONTRACT_GRANT: NASA ORDER T-82170
CONTRACT_GRANT: F33615-89-C-0603
CONTRACT_GRANT: F33615-92-C-0018
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available