Outcomes and Definitions
Calculated blood loss and estimated blood volume were defined as follows10:
ERCVlost = ERCVpreop + ERCVtransfused - ERCVpostop
EBVlost (mL/kg) = ERCVlost (mL)/[wt (kg) x Hctpreop/100]
EBV = 80 mL/kg (for infants < 12 months)
EBV = 75 mL/kg (for infants > 12 months)
[ERCV = estimated red cell volume, EBV = estimated blood volume, Hct = hematocrit, RBC = red blood cell]