A member asked:

Why do we take such small amount of blood from babies?

A doctor has provided 1 answer

Blood volume size: The average adult is likely to have 5, 000 to 6000 cc of blood making the average 5cc blood draw a trivial amount of their blood volume. The average newborn has about 300cc total blood volume & loss of 15 cc (3 average blood tubes) would be 5% of their blood volume could make them unstable & 30cc could send them into shock.

Answered 9/29/2017

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