Estimate pediatric blood-product volumes for pRBCs, platelets, FFP, cryoprecipitate, and whole blood, with blood-volume context and reference infusion rates.
Blood product use in children is usually reviewed in milliliters per kilogram rather than adult-sized units. The weight of the child, the estimated blood volume, and the clinical goal all shape how a pRBC, platelet, plasma, or cryoprecipitate request is translated into a worksheet volume.
Unlike adult transfusion practice, where one or more standard units are often ordered, pediatric plans are built around smaller aliquots and age-specific blood-volume estimates. A 5 kg infant and a 50 kg adolescent may both need red cells, but the practical dose and infusion plan are very different.
This page keeps that arithmetic in one place. It estimates blood volume from age-appropriate mL/kg values, shows rough volume math for hemoglobin or platelet goals, and displays commonly cited rate/effect references. It is meant to support dose review, not to replace transfusion thresholds, compatibility checks, or bedside monitoring.
Pediatric blood-product math is easy to get wrong because the same product looks very different in a neonate, an infant, and an adolescent. A worksheet helps keep the blood-volume estimate, target increment, reference rate, and product comparison in the same frame without pretending the page can make the transfusion decision by itself.
Estimated Blood Volume (EBV): Neonate = 85-90 mL/kg, Infant = 80 mL/kg, Child = 70-75 mL/kg pRBC Volume (mL) = (Target Hb - Current Hb) × Weight × 3 Standard pRBC dose: 10-15 mL/kg raises Hb ~2-3 g/dL Platelet dose: ~1 unit per 10 kg body weight FFP dose: 10-15 mL/kg Cryoprecipitate: 1 unit per 5 kg body weight
Result: 135 mL pRBC worksheet volume
For a 15 kg child with hemoglobin of 7 g/dL and a worksheet goal of 10 g/dL, the reference arithmetic is (10 − 7) × 15 × 3 = 135 mL. That number is a planning estimate only; the real transfusion plan still depends on symptoms, active bleeding, product type, and the treating team’s pathway.
Blood volume per kilogram decreases with age, so the same transfusion request means something different in a neonate than in a school-age child. Using an age-appropriate estimate keeps the calculated dose closer to the real intravascular volume the product has to replace.
Packed red cells are used to raise hemoglobin, platelets are used to reduce bleeding risk from thrombocytopenia, and plasma or cryoprecipitate are used to correct clotting-factor deficits. The practical question is not just how much to transfuse, but whether the chosen product actually matches the lab or clinical target.
Pediatric transfusion is safer when the infusion rate, expected response, and post-transfusion check are planned together. That makes it easier to compare a small aliquot for an infant with a larger dose for an older child and avoids relying on adult-sized assumptions.
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This worksheet uses age-adjusted blood-volume assumptions and common pediatric transfusion dose-response relationships to estimate product volume and expected increment. It is a planning aid, not a transfusion-ordering rule.
Thresholds vary by age, diagnosis, hemodynamics, active bleeding, and whether the child is critically ill. Many services use restrictive hemoglobin strategies for stable patients, but the actual decision is always more contextual than one number alone.
Rates depend on the product, the urgency, cardiac status, and the monitoring environment. The figures on this page are reference ranges that help with volume planning rather than instructions that fit every pediatric transfusion.
Neonates have a higher blood volume per kilogram (~85-90 mL/kg) due to proportionally larger blood volume relative to body mass. This decreases to ~70 mL/kg by adolescence.
That question depends on the child’s immune status, the indication, and the blood-bank policy. The calculator does not determine irradiation requirements; it only helps with the volume math.
Clinicians usually monitor for fever, urticaria, tachycardia, hypotension, respiratory changes, hemolysis signs, and volume overload. The exact monitoring checklist depends on product type, history, and institutional practice.
A 10–15 mL/kg pediatric pRBC dose is commonly expected to raise hemoglobin by roughly 2–3 g/dL, but the measured rise depends on active bleeding, hemolysis, splenic sequestration, and the interval before the post-transfusion lab.