Serum or Plasma Creatinine Concentration (Substance Concentration)

Why This Test Matters

Creatinine levels can indicate how efficiently your kidneys are working. High levels may suggest kidney problems, while low levels could indicate dehydration or other conditions. This test is often used alongside other kidney function tests to diagnose and monitor kidney disease.

How the Test Works

A small blood sample is taken from your arm. The lab then measures the concentration of creatinine in your blood using a specialized test, often an enzymatic method. This helps determine how well your kidneys are filtering waste from your bloodstream.

What to Expect Before the Test

You may be asked to avoid certain medications or foods that could affect results, but this depends on your specific test and medical history. Drink plenty of water the day before if your doctor suggests it, as dehydration can impact creatinine levels.

Common Causes of Abnormal Results

High creatinine levels might be due to kidney disease, dehydration, or conditions that reduce blood flow to the kidneys. Low levels could result from dehydration, overhydration, or certain muscle disorders. Always discuss any symptoms or concerns with your healthcare provider.