Term neonate blood volume per kilogram is approximately:

Term neonate blood volume per kilogram is approximately:

• A. 100 mL/kg
• B. 90 mL/kg
• C. 80 mL/kg
• D. 75 mL/kg

Answer: (B)

Term neonate blood volume per kilogram is about 90 mL/kg. This reflects that newborns carry more blood per unit of body weight than older individuals, due to a larger extracellular fluid and plasma volume relative to their weight. As a result, a term neonate’s total circulating blood is around 90 mL for every kilogram of body weight, so a 3 kg baby would have roughly 270 mL of blood. This value is important for guiding fluid management and transfusion decisions because losses are assessed relative to the estimated blood volume, not just the weight, and it helps explain why neonates can tolerate smaller absolute blood losses before needing intervention. While this figure is typical for term neonates, preterm infants can have a slightly higher EBV (around 100 mL/kg), and older children and adults have progressively lower per-kilogram values.

Term neonate blood volume per kilogram is about 90 mL/kg. This reflects that newborns carry more blood per unit of body weight than older individuals, due to a larger extracellular fluid and plasma volume relative to their weight. As a result, a term neonate’s total circulating blood is around 90 mL for every kilogram of body weight, so a 3 kg baby would have roughly 270 mL of blood. This value is important for guiding fluid management and transfusion decisions because losses are assessed relative to the estimated blood volume, not just the weight, and it helps explain why neonates can tolerate smaller absolute blood losses before needing intervention. While this figure is typical for term neonates, preterm infants can have a slightly higher EBV (around 100 mL/kg), and older children and adults have progressively lower per-kilogram values.