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What is A man weighing 70 kg has a hematocrit of 45%. What would he his approximate plasma volume? and explain in detail?
Ans. (d) 3080mL(Ref: Ganong Review of medical physiology, 21st ed p.2)8% of body weight is blood volumeSo, here for 70 kg man, Blood volume is 5.6 Litres (70*8/100)Blood Volume = Plasma volume/1-hematocritSo, Plasma volume = Blood volume*(1-hematocrit)Here, Plasma volume =5.6*(1-0.45)=3080mL