Risk Risk of Bone Fracture due to Spaceflight-induced Changes to Bone
Short Title: Fracture Last Published:  11/23/20 11:55:09 AM (Central)
Element: Exploration Medical Capability (ExMC)
Evidence:  Report
Risk Master Logic Diagram:  Not Available
Point of Contact:  Kris Lehnhardt
HRP Risk Status: Active [current research ongoing]
Risk Ratings and Dispositions per Design Reference Mission (DRM) Category
DRM CategoriesMission
OperationsLong-Term Health
LxCRisk Disposition *LxCRisk Disposition *
Low Earth Orbit6 months1x4Accepted/Standard Refinement2x3Accepted/Standard Refinement
1 year1x4Accepted/Standard Refinement2x3Accepted/Standard Refinement
Deep Space Sortie1 month1x4Accepted/Low Probability1x3Accepted/Low Probability
Lunar Visit/
1 year1x4Accepted/Optimize2x3Accepted/Optimize
Deep Space
1 year1x4Accepted/Optimize2x3Accepted/Optimize
Planetary3 years1x4Accepted/Optimize3x3Accepted/Optimize
Note: LxC is the likelihood and consequence rating. The information above was last approved by the Human System Risk Board in 11/2017.
Risk Statement

Given that spaceflight may induce adverse changes in bone ultimate strength with respect to mechanical loads during and post-mission, there is a possibility a fracture may occur for activities otherwise unlikely to induce fracture prior to initiating spaceflight.

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