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Prebreathe Protocol for Extravehicular Activity Technical Consultation ReportIn the performance of EVA by that National Aeronautics and Space Administration (NASA) astronauts, there exists a risk of DCS as the suit pressure is reduced to 4.3 pounds per square inch, absolute (psia) from the International Space Station (ISS) pressure of 14.7 psia. Several DCS-preventive procedures have been developed and implemented. Each of these procedures involve the use of oxygen (O2) prebreathe to effectively washout tissue nitrogen (N2).The management of the ISS Programs convened an expert independent peer review Team to conduct a review of the Decompression Sickness (DCS) risks associated with the Extra Vehicular Activity (EVA) Campout Prebreathe (PB) protocol for its consideration for use on future missions. The major findings and recommendations of the expert panel are: There is no direct experimental data to confirm the potential DCS risks of the Campout PB protocol. However, based on model data, statistical probability, physiology, and information derived from similar PB protocols, there is no compelling evidence to suggest that the Campout PB protocol is less safe than the other NASA approved PB protocols.
Document ID
Document Type
Technical Memorandum (TM)
Ross, Jerry (NASA Langley Research Center Hampton, VA, United States)
Duncan, Michael (NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 24, 2013
Publication Date
April 1, 2008
Subject Category
Aerospace Medicine
Report/Patent Number
Funding Number(s)
WBS: WBS 510505.
Distribution Limits
Work of the US Gov. Public Use Permitted.

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NameType 20080021669.pdf STI