The clearance of what substance provides the best estimate of renal blood flow rate?
A) creatine
B) inulin
C) glucose
D) sodium
E) PAH

Question

Quizplus · Accepted Answer

PAH (para-aminohippuric acid) clearance is used to estimate renal plasma flow, which closely approximates renal blood flow when hematocrit is accounted for. PAH is almost completely cleared from the plasma in a single pass through the kidneys, making it an excellent marker for renal blood flow estimation.

The Clearance of What Substance Provides the Best Estimate of Renal