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Flashcards in Renal Studies Deck (18):
1

glomerular filtration rate

ability of the kidneys to clear out waste products

2

what is a normal GFR per day?

150-250 L/24 hrs

3

why do we measure kidney function with creatinine?

it is always being sloughed off from muscles

4

low level of creatinine in urine means

low kidney function

5

what are the three ways to estimate GFR?

1. Cockcroft-Gault formula
2. MDRD (modification of diet in renal dz)-best estimate
3. 24 hr urine

6

what does MDRD help to differentiate?

race and gender and age
-AA progress slower
-males have higher protein

7

what does Cockcroft-Gault help to differentiate?

male/female and age

8

how is ESRD defined?

on dialysis or GFR of <15%

9

what is the formula for Cockcroft-Gault?

[(140-age) x wt (kg)] / (Plasma Cr x 72)

10

what do you multiple Cockcroft-Gault times to adjust for female?

0.85

11

what is a restriction of Cockcroft-Gault?

overestimates GFR in obese and edemous patients

12

what has to happen when pt turns in a 24 hour urine specimen

get serum Cr!!!!!!!!!!!

13

what is the Cr clearance equation?

(UCr x Uv) / (SCr x time (1440 minutes))

14

what is an acceptable proteinuria value?

< 150mg/24hrs

15

what is acceptable proteinuria value for DM pts?

<30mg/ 24hr

16

what is the nephrotic range of proteinuria?

>3.5 g / 24 hrs

17

which spot test will you order with high risk pt with negative dipstick?

albumin-creatinine ratio
normal is < 30

18

which spot test will you order with positive dipstick?

protein-creatinine ratio

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