BOTH renal blood flow question

[notahappycamper]

Why is Renal Blood Flow= Renal Plasma Flow/ (1-Hematocrit)
wouldn't it make more sense for it to be Renal Blood Flow=Renal Plasma Flow * (1-Hematocrit)

because 1-Hematocrit= fraction of blood volume that is plasma?

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[Rahas]

That would make RBF less than RPF, which doesnt make any sense, since RBF is RPF + blood cells

 

[Fruit Plant]

Why is Renal Blood Flow= Renal Plasma Flow/ (1-Hematocrit)
wouldn't it make more sense for it to be Renal Blood Flow=Renal Plasma Flow * (1-Hematocrit)

because 1-Hematocrit= fraction of blood volume that is plasma?

Blood refers to the combination of both the solid red blood cells in addition to the liquid plasma. Hematocrit refers to the portion of blood that is only the solid red blood cells (usually ~45% of the total blood volume for healthy males). Thus, the remaining portion (1 - hematocrit, or ~55%) is the liquid plasma.

So if you are given renal blood flow (sum of red blood cells + plasma) you can calculate renal plasma flow as follows:

Renal Plasma Flow = Renal Blood Flow * (1 - hematocrit)
Rearranging:
Renal Blood Flow = (Renal Plasma Flow)/(1 - hematocrit)

Hope this helps!

 

[Porcelain Gallbladder]

1.hct= RBC/blood
2. RBC = blood-plasma
3. hct= ( blood-plasma)/blood
4. hct= 1- (plasma/blood)
5. 1-hct= plasma/blood
6. blood = plasma/(1-hct)
7. thanks for q. hope it helps.