Erythrocyte Lysis Rate (24-hour urine collection)

What This Test Measures

The test evaluates the rate at which red blood cells (erythrocytes) lyse (break down) in your urine over a full day. This process is influenced by factors like kidney function, blood disorders, or exposure to certain medications or toxins. The urine sample is collected over 24 hours, and the test quantifies the amount of hemoglobin or other breakdown products released from lysed red blood cells.

Why It’s Done

Your healthcare provider may order this test if you have symptoms like dark urine, anemia, or signs of kidney problems. It can also help diagnose conditions such as hemolytic anemia, kidney disease, or reactions to medications that affect red blood cells.

Sample Collection and Preparation

You’ll collect all urine produced in a 24-hour period in a special container. Drink plenty of fluids to ensure adequate urine volume, but avoid foods or supplements that may interfere with the test results. Return the container to your provider’s office or lab on time for accurate testing.

What to Expect During the Test

No special preparation is needed beyond the 24-hour urine collection. The test itself is typically done in a lab using automated methods to measure the lysis rate. Results are compared to standard reference ranges to determine if further evaluation is needed.