Red Blood Cell Transfusion Characteristics and Morbidity or Mortality in Very-Low-Birth-Weight Infants

Area of Science:

• Neonatal Medicine
• Hematology
• Pediatric Transfusion Medicine

Background:

• Few studies have explored modifiable aspects of red blood cell (RBC) transfusions and their association with recipient outcomes in very-low-birth-weight (VLBW) infants.
• Understanding these associations is crucial for optimizing transfusion practices in this vulnerable population.

Purpose of the Study:

• To investigate the relationship between blood donor characteristics, RBC modifications and storage, and transfusion parameters with serious adverse outcomes in VLBW infants.
• To identify potentially modifiable factors in RBC transfusions that could improve VLBW infant outcomes.

Main Methods:

• A prospective birth cohort study involving VLBW infants (<1500 g) across multiple US hospitals.
• Data linkage of electronic medical records, blood donor information, and Vermont Oxford Network outcome data.
• Multivariable generalized estimating equation regression models were used to analyze associations between transfusion characteristics and a composite outcome of severe morbidities or mortality.

Main Results:

• Higher pretransfusion hemoglobin levels were associated with increased odds of the composite outcome (OR, 1.15 per 1 g/dL increase).
• Use of additive solutions (AS)-1 or AS-5 was linked to lower odds of the composite outcome compared to older solutions.
• Specific factors like transfusion dose, donor age, storage duration, and donor sex showed associations with individual secondary outcomes, including mortality, BPD, NEC, and IVH.

Conclusions:

• Pretransfusion hemoglobin and the type of anticoagulant preservative solution are key modifiable factors associated with composite morbidities and mortality in VLBW infants.
• While many modifiable blood banking practices did not show significant associations, specific donor and blood banking factors warrant further investigation as potential targets for improving VLBW infant care.