Creatinine Clearance
Creatinine clearance estimates glomerular filtration rate by measuring creatinine excretion in urine relative to serum creatinine.
Why a doctor may order this
To assess kidney function more precisely than serum creatinine alone.
Why you may need this
If you are over 40, have diabetes, high blood pressure, or family kidney disease — checks how well your kidneys filter waste.
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