7.2. Renal Assessment and Micturition - Measurement of Renal Plasma Flow

Question 1

What is used to measure renal plasma flow?

Answer 1

Para-Amino-Hippuric Acid (PAH Acid)

Question 2

What is Para-Amino-Hippuric Acid (PAH Acid)?

Answer 2

An orgaic anion

Question 3

How is Para-Amino-Hippuric Acid (PAH Acid) filtered at the glomerulus?

Answer 3

Freely

Question 4

What happens to the remaining Para-Amino-Hippuric (PAH) Acid in the plasma?

Answer 4

It is actively secreted into the tubule

Question 5

What is the result of Para-Amino-Hippuric (PAH) Acid being freely filtered at the glomerulus, and actively secreted into the tubule?

Answer 5

More than 90% of the plasma is cleared of Para-Amino-Hippuric (PAH) Acid content in one transit of the kidney

Question 6

What is the advantage of >90% of Para-Amino-Hippuric Acid being cleared in one transit of the kidney?

Answer 6

PAH clearance is a measure of all the plasma flowing through the kidney in a given time

Question 7

What does Para-Amino-Hippuric Acid clearance equal?

Answer 7

Renal Plasma Flow

Question 8

What is renal plasma flow?

Answer 8

660mls/minute