Figure 3.

A real use case based on a clinical inquiry for transfusion requirements for neonates and infants younger than 6 months undergoing resection of a sacrococcygeal teratoma. This condition is usually present at birth and typically requires large transfusion volumes. The initial Current Procedural Terminology (CPT) filter retrieved 43 patients (age 0 days to 6 months), of which 21 received blood transfusions. The mean (SD) weight for the patients in this selection was 3.1 (1.4) kg, age was 19 (39.7) days, and transfusion requirement was 43.9 (81.20) mL/kg. For reference, the circulating blood volume in a term newborn is ∼90 mL/kg. ICD, International Classification of Disease.