<unk>  or acute blood loss<unk>  is a condition in which a person quickly loses a large volume of circulating hemoglobin. Acute blood loss is usually associated with an incident of trauma or a severe injury resulting in a large loss of blood. It can also occur during or after a surgical procedure.
Acute posthemorrhagic anemia
Acquired hemolytic anemia
Transfusion-dependent anemia
Iatrogenic anemia
Post-transfusion purpura
Mechanical hemolytic anemia
Acute hemolytic transfusion reaction
EEM syndrome