Objective: Results of a large multicenter randomized clinical trial published in 2007 demonstrated no benefit in using a liberal versus conservative RBC transfusion threshold in stable critically ill children. Using the conservative threshold decreased the number of RBC transfusions without increasing adverse outcomes. We aimed to determine if wide dissemination of this evidence altered the hemoglobin threshold used for RBC transfusions in our pediatric medical-surgical ICU.
Design: Before-after retrospective cohort study using multiple administrative databases and chart review.
Setting: PICU serving medical and surgical patients.
Patients: All potentially stable children receiving a RBC transfusion in the PICU in 2006 (prepublication) and in 2009-2010 (postpublication). Children were considered unstable and excluded if they were severely hypoxic, receiving renal replacement therapy, hemodynamically unstable, or bleeding.
Interventions: Physician education on evidence supporting hemoglobin transfusion thresholds in teaching conferences, staff meetings, and via e-mail.
Measurements And Main Results: In 2006, 14.6% of patients (n = 285/1,940) received a RBC transfusion. In 2009-2010, 12.1% of patients (n = 551/4,542) received a RBC transfusion. We evaluated patients transfused when they were potentially clinically stable, including 145 children in 2006 (191 transfusion days) and 266 children in 2009-2010 (369 transfusion days). We found no significant differences in age, sex, race, diagnoses, postoperative status, illness severity scores, mortality, or length of stay between these two groups. The median hemoglobin transfusion threshold decreased significantly from 8.0 g/dL (interquartile range 7.3, 8.6 g/dL) in 2006 to 7.5 g/dL (interquartile range 6.9, 8.1 g/dL) in 2009-2010 (p = 0.001). The percentage of transfusion days using a hemoglobin threshold more than 7 g/dL decreased from 81% (n = 154) in 2006 to 71% (n = 261) in 2009-2010.
Conclusion: Although transfusion thresholds in potentially stable critically ill children in our PICU significantly decreased after dissemination of best available evidence, 71% of patients were transfused at a hemoglobin threshold more than 7 g/dL.
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