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Updated: Oct 29, 2025
A Precision Medicine Tool for Measurement and Monitoring of Hemoglobin S in Sickle Cell Disease Patients Receiving Transfusion Therapy
Impact of universal irradiation on chronic transfusion for sickle cell disease
Gabriel Salinas Cisneros1, Jennifer Webb1,2, Naomi L C Luban1,2
1Children's National Hospital, Washington, District of Columbia, USA.
Insights
Universal blood irradiation did not increase transfusion needs for pediatric sickle cell disease (SCD) patients on chronic transfusions. This finding suggests irradiation is safe for SCD patients, impacting neither transfusion volumes nor lab values.
Area of Science:
- Hematology
- Transfusion Medicine
- Pediatric Hematology
Background:
- Blood product irradiation prevents transfusion-associated graft-versus-host disease.
- Most patients do not require irradiation, which may negatively affect transfusion outcomes.
- The study investigates if irradiation increases transfusion requirements in pediatric sickle cell disease (SCD) patients undergoing chronic transfusion.
Purpose of the Study:
- To evaluate the impact of universal blood product irradiation on transfusion requirements in pediatric patients with SCD.
- To assess changes in pretransfusion laboratory values following the implementation of universal irradiation.
Main Methods:
- Retrospective chart review of pediatric SCD patients receiving chronic red blood cell (RBC) transfusions.
- Comparison of transfusion volumes and key laboratory values before and after a hospital-wide irradiation policy implementation in May 2018.
- Analysis of 17 patients, examining RBC volume per kilogram and pretransfusion levels of hemoglobin, reticulocytes, and other relevant markers.
Main Results:
- Universal irradiation did not significantly increase RBC transfusion volumes per patient weight (median change +1.7 ml/kg/year, p=0.54).
- No significant changes were observed in pretransfusion laboratory values, including hemoglobin, hemoglobin S%, absolute reticulocyte count, and ferritin.
- Patient transfusion needs were similar before and after the policy change, with 8 receiving more RBCs pre-irradiation and 9 post-irradiation.
Conclusions:
- Blood product irradiation does not appear to significantly alter transfusion requirements in pediatric SCD patients on chronic transfusion therapy.
- Irradiation has no clinically significant adverse consequences on transfusion management or laboratory parameters in this patient population.
- The findings support the continued use of irradiation when indicated, without apparent detriment to transfusion management in SCD.
Background:
Irradiation of blood products prevents transfusion-associated graft-versus-host disease, but most patients do not require this modification which could have an adverse impact on transfusion outcomes. We hypothesized that irradiation may increase transfusion requirements for patients with sickle cell disease (SCD) receiving chronic transfusion.
Study Design And Methods:
Our pediatric hospital implemented a new policy of universal blood product irradiation in May 2018. We conducted a retrospective chart review of patients with SCD receiving chronic red blood cell (RBC) transfusion throughout the year before and after institution of this policy. The primary outcome was the change in RBC transfusion volume per patient weight transfused during the pre- vs. post- universal irradiation period. Secondary outcomes were the change in median pretransfusion laboratory values.
Results:
Among 17 patients, 8 (47%) received more RBCs the year before irradiation and 9 (53%) received more the year after irradiation. Implementation of universal irradiation did not significantly increase transfusion volumes needed to clinically manage this population (median change +1.7 ml/kg/year, p = .54). Additionally, there were no significant changes in absolute reticulocyte count, hemoglobin, hemoglobin S%, white blood cell count, lactate dehydrogenase, total bilirubin, serum potassium, and ferritin during the two time periods.
Conclusion:
In a cohort of patients with SCD receiving simple chronic transfusion, irradiation did not impact transfusion requirements or pertinent pretransfusion laboratory values. Irradiation does not appear to have clinically significant consequences for SCD chronic transfusion management.
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