Short Title: Hypobaric Hypoxia Last Published:  07/31/18 09:30:03 AM (Central)
Element: Human Health Countermeasures (HHC)
Evidence:  Report
Risk Master Logic Diagram:  Diagram
Point of Contact:  Jason Norcross
Risk Ratings and Dispositions per Design Reference Mission (DRM) Category
DRM CategoriesMission
OperationsLong-Term Health
LxCRisk Disposition *LxCRisk Disposition *
Low Earth Orbit6 months3x3Requires Mitigation/Data3x2Requires Mitigation/Data
1 year3x3Requires Mitigation/Data3x2Requires Mitigation/Data
Deep Space Sortie1 month3x2Accepted with Monitoring1x1Accepted
Lunar Visit/
1 year3x3Requires Mitigation/Data3x2Requires Mitigation/Data
Deep Space
1 year3x3Requires Mitigation/Data3x2Requires Mitigation/Data
Planetary3 years3x3Requires Mitigation/Data3x2Requires Mitigation/Data
Note: LxC is the likelihood and consequence rating.
Risk Statement
Given that future human exploration missions will require a robust, flexible EVA architecture not provided with existing approved operational prebreathe protocols, but that might be met by the use of a reduced pressure cabin atmosphere, there is a possibility that this staged atmosphere could result in compromised health and performance to the crewmember due to exposure to mild hypobaric hypoxia.
Gaps (7)