RENAL FUNCTION TESTS

Question 1

Relationship between BUN and urea

Answer 1

Convert BUN to urea by multiplying by 2.14 or 60/28
BUN is used in USA
Urea is used in Europe

Question 2

Urine Albumin creatinine ratio levels

Answer 2

A1: <3mg/mmol or 30mg/g

A2: 3-30mg/mmol or 30-300mg/g

A3: >30mg/mmol or 300mg/g

Question 3

Proteinuria values in 24 hour urine test

Answer 3

1+ - 30mg of protein
2+ - 100mg of protein
3+ - 400mg of protein
4+ - 1000mg of protein

Question 4

BUN to Creatinine ratio

Answer 4

> 20:1 - Prerenal AKI
20-10:1 - Intrarenal AKI
<10:1 - Post renal

Question 5

Urea to Creatinine ratio

Answer 5

> 100:1 - Prerenal azotemia
40-100:1 - Renal azotemia
<40:1 - Postrenal azotemia

Question 6

Inulin clearance

Answer 6

Normal range
Men = 125 + 15 (SD) mL/min/m2
Women = 110 + 15 mL/min/m2

Question 7

I-Iothalamate and Cr-EDTA Clearance

Answer 7

Normal reference range
87–141 mL/min/SA

Question 8

Cystatin C clearance

Answer 8

men
0.6–1.52 mg/L
women
0.57–1.45 mg/L

Question 9

Serum creatinine

Answer 9

adults,
0.6–1.2 mg/dL (53–106 mmol/L) in men
0.5 - 1.1mg/dl (44-97mmol/L) in women

young children
0.2–0.7 mg/dL (18–62 mmol/L)

Question 10

Normal blood urea nitrogen

Answer 10

8–23 mg/dL (2.9–8.2 mmol/L)

Question 11

Calculation of BSA

Answer 11

BSA (m2 ) =Squared root of ( [height (cm)×weight (kg)]/3600 )

BSA (m2 ) = Squared root of ( [height (in) ×weight (lb)]/3131 )