05.05 - Eval of Renal Fxn (Rao) - Prerecorded

Question 1

Uin =

Answer 1

GFR x Pin / UF

Question 2

Water input to kidney is same as

Answer 2

Plasma flow into kidney

Question 2

What is extraction ratio

Answer 2

Percentage of substance removed from plasma

Question 3

How does Plasma Creatinine relate to GFR

Answer 3

Logarithmic, Creatinine not very sensitive = takes a large decrease in GFR to get significant increase in Pcreatinine

Question 3

How does Pcr change after Uninephrectomy

Answer 3

If GFR decreases by half, Pcr doubles

Question 4

If substance is reabsorbed it means what for Clearance

Answer 4

Clearance less than GFR

Question 5

Filtration Rate =

Answer 5

GFR x Px

Question 6

GFR =

Answer 6

Uf x Uin / Pin

Question 7

Mass Flow =

Answer 7

Concentration x Volume Flow

Question 8

If substance X is completely cleared from plasma, Cx =

Answer 8

Total Renal Plasma Flow

Question 10

Rate of Output from kidney depends on

Answer 10

Renal Vein + Lymphatics + Urine

Question 11

Rate of Filtration or Excretion =

Answer 11

Solute Conc. x Volume Flow Rate

Question 11

If substance is secreted it means what for Ex Ratio

Answer 11

Higher

Question 12

Clearance of what substance approximately equals Effective Renal Plasma Flow

Answer 12

PAH

Question 13

If substance is secreted it means what for Clearance

Answer 13

Clearance is greater than GFR

Question 14

Clearance of Inulin essentially =

Answer 14

GFR

Question 15

Cin =

Answer 15

(UF x Uin) / Pin

Question 16

How does Clearance of Creatinine compare to Inulin

Answer 16

A little higher b/c creatinine is secreted

Question 18

Extraction Ratio =

Answer 18

(Ax-Vx)/Ax

Question 19

If substance is reabsorbed it means what for Ex Ratio

Answer 19

Lower

Question 20

Excretion Rate =

Answer 20

UF x Ux

Question 22

Cpah =

Answer 22

Effective Renal Plasma Flow

Question 23

Extraction ratio of PAH

Answer 23

0.9 - 0.95