Creatinine Clearance (Calculated from Serum Creatinine and Estimated Glomerular Filtration Rate)

Why This Test Matters

Creatinine clearance is used to evaluate how effectively your kidneys are removing waste products from your blood. It helps doctors monitor kidney health, especially in people with diabetes, high blood pressure, or other conditions that may affect kidney function.

How the Test Works

Your healthcare provider will calculate creatinine clearance using a formula that combines your serum creatinine levels (a blood test) and an estimate of your glomerular filtration rate (GFR), which reflects kidney function. This test does not require a urine sample to be collected at home; results are derived from bloodwork alone.

What to Expect Before the Test

No special preparation is needed for this test. You may have a simple blood draw, often done while you sit comfortably. If you are being monitored for kidney function over time, your doctor may recommend periodic blood tests to track changes in your results.

What the Results Mean

Creatinine clearance results are typically reported as a rate (e.g., milliliters per minute or milliliters per hour). Lower values may indicate reduced kidney function, while higher values suggest better filtration. Your doctor will interpret these results in the context of your overall health and medical history.