The Public Health Agency of Canada (PHAC) grades transfusion reactions based on severity.
Transfusion Reaction
Severity
Grade
recipient received medical intervention; not associated with permanent iniury (damage, disability) if medical care not given
nonsevere
1
required hospitalization or prolonged a hospital stay; associated with persistent or significant disability/incapacity; medical or surgical intervention required to prevent permanent injury (damage, disability);
severe
2
major intervention required (admission to ICU, vasoporessors, etc)
life-t
hreatening
3
death
fatal
4
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