title: Delayed intravascular haemolysis following multiple asymptomatic ABO-incompatible red blood cell transfusions in a patient with hepatic failure.
abstract: ABO-incompatible red blood cell (RBC) transfusions have rarely been associated with delayed haemolysis. However, we report the case of a 75-year-old man (blood type O) with hepatic disease, who received 5 units of incompatible type B RBCs over 8 days. The patient did not develop symptomatic or biochemical evidence of haemolysis until 7-8 days after the first incompatible RBC unit. The patient had a low anti-B antibody titre (1 : 64) prior to the first transfusion. The onset of haemolysis was temporally associated with an increase in anti-B and the infusion of fresh-frozen plasma. In conclusion, a patient with hepatic failure experienced a delayed haemolytic transfusion reaction after receiving multiple ABO-incompatible RBC transfusions that were initially well-tolerated. We speculate that the delayed haemolysis may have resulted from an anamnestic antibody response to the initial incompatible transfusion, or possibly as a result of the transfusion of fresh-frozen plasma, which might have repleted low complement levels.
authors.affiliation: Pathology and Laboratory Medicine Service, VA Connecticut Healthcare System, West Haven, USA.
authors.forename: C A
authors.initials: CA
authors.lastname: Tormey
authors.forename: G
authors.initials: G
authors.lastname: Stack
mesh_terms: D000017:ABO Blood-Group System; D000368:Aged; D001787:Blood Group Incompatibility / Q000097:blood* / Q000209:etiology; D017707:Erythrocyte Transfusion; D006461:Hemolysis; D006801:Humans; D017093:Liver Failure / Q000097:blood / Q000628:therapy*; D008297:Male; D013997:Time Factors
chemical_list: D000017:ABO Blood-Group System