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Amount of plasma removal for Exchange Transfusion?


Kandahlawi

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If I have a case needed Exchange Transfusion, both mother and baby blood group are A. How much plasma should i remove from whole blood to make the final haematocrit around 50? Is there any special formula? I want to refrain myself from using Reconstituted blood as this may expose to 2 donors. 

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V1  x C1 = V2  x C2  where V1 is volume of initial unit in mL, C1 = hematocrit (%) of initial unit, C2 = desired hematocrit (%), and V2 = final volume in mL

V1 - V2 =  volume of plasma to remove in mL

1.06 g/mL is approximate specific gravity of whole blood.  You will need to subtract the tare weight of empty collection bag and convert weight to volume using specific gravity.

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