How much blood can a person lose before needing a transfusion?



  1. 0 Votes

    A person who loses 40% or more of their blood can no longer compensate and will die without a transfusion.  Theoretically, a person who loses less than 40% (but still a significant amount, like 30%) can survive without a transfusion, but the odds are certainly against him or her.  A transfusion, if done correctly, makes it much easier for the body to stay functioning and eventually heal.

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