Question 1

What is the primary purpose of measuring creatinine clearance in renal lab tests?

Accepted Answer

To assess kidney function and glomerular filtration rate

Answer

To diagnose urinary tract infections

Answer

To measure blood glucose levels

Answer

To evaluate liver function

Question 2

Which formula is commonly used to estimate creatinine clearance from serum creatinine levels?

Accepted Answer

Cockcroft-Gault formula

Answer

BUN/Creatinine ratio

Answer

MDRD formula

Answer

Framingham risk score

Question 3

What is the significance of a decreased creatinine clearance value?

Accepted Answer

It indicates impaired kidney function

Answer

It indicates enhanced kidney function

Answer

It suggests increased muscle mass

Answer

It reflects a higher dietary protein intake

Question 4

What is the normal range for creatinine clearance in healthy adults?

Accepted Answer

Approximately 90 to 120 mL/min

Answer

40 to 60 mL/min

Answer

200 to 250 mL/min

Answer

30 to 50 mL/min

Question 5

Which substance is typically used in the measurement of creatinine clearance?

Accepted Answer

Creatinine

Answer

Glucose

Answer

Urea

Answer

Bilirubin

Question 6

What is the primary sample type used to calculate creatinine clearance?

Accepted Answer

24-hour urine collection

Answer

Plasma sample

Answer

Random urine sample

Answer

Glycosylated hemoglobin

Question 7

Why might creatinine clearance be adjusted for body surface area (BSA)?

Accepted Answer

To account for differences in muscle mass and kidney function relative to body size

Answer

To measure dietary intake

Answer

To assess liver function

Answer

To evaluate bone density

Question 8

What factors can affect the accuracy of creatinine clearance measurements?

Accepted Answer

Muscle mass, age, diet, and hydration status

Answer

Blood pressure levels

Answer

Body temperature

Answer

Heart rate

Question 9

What is the impact of dehydration on creatinine clearance results?

Accepted Answer

It can lead to falsely elevated creatinine levels and lower clearance rates

Answer

It has no impact on results

Answer

It decreases serum creatinine levels

Answer

It increases urine output

Question 10

Which condition might lead to an increased creatinine clearance value?

Accepted Answer

Pregnancy

Answer

Heart failure

Answer

Chronic kidney disease

Answer

Dehydration

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