Cord blood unit exploded

Record number: 
Adverse Occurrence type: 
MPHO Type: 
Alerting signals, symptoms, evidence of occurrence: 
CBU exploded in the water bath
Demonstration of imputability or root cause: 
Likely due to leakage of liquid nitrogen into the bag.
Suggest references: 
World Marrow Donor Association.S(P)EAR Committee Annual Report - year 2011