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Answer :
Final answer:
To raise the Hb level of an average 6-year-old child from 70 to 80, 160 mL( option C) pRBC would be needed.
Explanation:
To determine how much volume of packed Red Blood Cells (pRBC) is needed to increase the Hemoglobin (Hb) from 70 to 80, we need know the child's blood volume.
Assuming a normal adult has a total blood volume of 5 liters (or 5000 mL), a child's blood volume is approximately 80 mL/kg. As per WHO, an average 6-year-old child weighs about 20kg, so their blood volume would be about 1600 mL.
Each mL of pRBCs increases Hb by about 1 g/L. Thus, to raise Hb from 70 to 80, we would require 10 mL pRBC per L of blood. Therefore, for our given child, to raise Hb from 70 to 80, we would require (10 mL/L * 1600 mL) = 16000 mL = 160 mL pRBC. Hence, C. 160mL is the correct option.
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