Risk Risk of Spaceflight Associated Neuro-ocular Syndrome (SANS)
Short Title: SANS Last Published:  07/31/19 10:05:29 AM (Central)
Element: Human Health Countermeasures (HHC)
Evidence:  Report
Risk Master Logic Diagram:  Not Available
Point of Contact:  Michael Stenger
HRP Risk Status: 
Risk Ratings and Dispositions per Design Reference Mission (DRM) Category
DRM CategoriesMission
OperationsLong-Term Health
LxCRisk Disposition *LxCRisk Disposition *
Low Earth Orbit6 months3x2Accepted3x2Accepted
1 year3x2Accepted3x3Accepted
Deep Space Sortie1 month3x1Accepted3x1Accepted
Lunar Visit/
1 year3x2Accepted3x3Accepted
Deep Space
1 year3x4Requires Mitigation3x4Requires Mitigation
Planetary3 years3x4Requires Mitigation3x4Requires Mitigation
Note: LxC is the likelihood and consequence rating. This risk title has been updated by HRP and is pending document update at the HSRB. The current HSRB risk title is “Risk of Spaceflight-Induced Intracranial Pressure/Vision Alterations” (VIIP).
Risk Statement
Given that the microgravity environment causes cephalad fluid shift in astronauts, there is a probability that astronauts will have intracranial pressure changes to some degree, and if left untreated, could lead to vision alterations and potentially other deleterious health effects.
Gaps (4)