Serum Creatinine (Creatinine Level)

Why This Test Matters for Dialysis Patients

For patients on dialysis, especially those dialyzing multiple times a week, creatinine levels are closely monitored. High levels may indicate poor kidney function before or after dialysis sessions, while consistently low levels could signal over-dialysis or other issues. Your doctor may adjust your dialysis schedule based on these results to maintain balance in your body’s waste removal system.

What to Expect During the Test

This test involves a simple blood draw from a vein, usually in your arm. No special preparation is needed, but fasting may be advised depending on your doctor’s instructions. The sample is sent to a lab for analysis.

How Results Are Used in Dialysis Care

Your creatinine levels help doctors determine how well your kidneys are functioning between dialysis sessions. If your levels rise unexpectedly, it may mean your kidneys aren’t filtering waste as effectively, prompting adjustments to your dialysis timing or intensity. Consistently low levels might suggest your body is losing too much fluid or electrolytes.

Common Causes of Abnormal Results

High creatinine levels can result from kidney disease, dehydration, or muscle breakdown. Low levels may occur if you’re overhydrated, have severe muscle loss, or are receiving dialysis too aggressively. Other factors like certain medications or liver disease can also influence these results.