Serum Creatinine (Creatinine Level)

Why This Test Matters

Creatinine is a byproduct of muscle breakdown and is normally filtered out of your blood by your kidneys. If your kidneys aren’t working well, creatinine levels can build up in your blood. This test helps doctors monitor kidney health, especially in people with diabetes, high blood pressure, or other conditions that may affect the kidneys.

What to Expect Before the Test

No special preparation is needed for this test. You may have a small needle inserted into a vein in your arm to draw blood. If you’re on a dialysis machine or have a central venous catheter, your blood may be drawn directly from that site. The process usually takes a few minutes.

What the Results Mean

Higher than expected creatinine levels may indicate poor kidney function, while lower levels could suggest dehydration or overhydration. Your doctor will interpret the results in relation to your overall health and other tests.

Common Causes of Abnormal Results

Creatinine levels can be affected by factors like muscle mass, hydration status, and certain medications. Kidney diseases, heart conditions, or severe infections can also influence these levels. Your doctor will consider all relevant factors when reviewing your results.