What is the (clearance of PAH)/(1 - hematocrit) equal to?
A) renal blood flow
B) clearance
C) filtered load
D) excretion rate
E) filtration fraction

Question

Quizplus · Accepted Answer

The (clearance of PAH)/(1 - hematocrit) is equal to renal blood flow. PAH (para-aminohippuric acid) clearance is used to estimate renal plasma flow because PAH is both filtered and secreted in the renal tubules, ensuring that nearly all of it that enters the kidney is excreted. Adjusting for hematocrit gives an estimate of the total renal blood flow, as hematocrit represents the fraction of blood volume occupied by red blood cells, and the adjustment accounts for the plasma volume, which is the actual fluid phase carrying PAH through the kidneys.

What Is the (Clearance of PAH)/(1 - Hematocrit) Equal To