Trend in ABO-incompatible RBC transfusion-related fatalities reported to the FDA, 2000-2019.

Background ABO-incompatible red blood cell (RBC) transfusions and acute hemolytic reactions occur infrequently, yet resultant fatalities are reported to the US Food and Drug Administration (FDA) every year. We describe a 20-year retrospective study of reported mistransfusion cases to identify temporal trends, common causes, and corrective actions taken to prevent recurrence. Study Design and Methods ABO-incompatible RBC transfusion-related fatalities reported to the FDA in 2000-2019 were reviewed for patient demographics, primary attributed cause, contributing factors, and corrective actions. Results Eighty reported deaths after ABO-incompatible RBC transfusion occurred in the 20-year period. A decrease in the number of cases after 2008 was sustained through 2019 (mean 6 cases/y, 2000-2009 vs 2 cases/y, 2010-2019). The estimated rate of reported mistransfusion fatalities was 1 per 2 million RBC units transfused in 2000-2009 and 1 per 7.14 million RBC units in 2010-2019 (P < .0001). Administration errors (wrong patient or wrong unit transfused) and sample collection errors (wrong blood in tube [WBIT]) significantly decreased over time but remained the most common causes. In all WBIT cases, verification of patients' ABO type with a second sample or historical type was not performed before transfusion; 16 of 19 (84%) institutions that reported corrective actions subsequently instituted this requirement. In the other categories, 22 of 58 (38%) facilities reported plans for technological process improvements, such as electronic patient identification. Conclusions The rate of reported fatalities from ABO-incompatible RBC transfusion has significantly decreased in the past decade. Still, about two cases are reported each year, highlighting gaps in best practices and areas for improvement.