Serum or plasma concentration of a specific protein marker (likely related to renal function or inflammation, such as **Cystatin C** or **Beta-2-Microglobulin**)

What This Test Measures

The test detects the presence and concentration of a protein that may be linked to kidney function or inflammation. This protein is typically filtered by the kidneys or produced by immune cells. Your healthcare provider may order this test to check for kidney disease, monitor chronic conditions, or evaluate responses to treatment.

Why It’s Ordered

Your doctor may recommend this test if you have symptoms like fatigue, swelling, frequent urination, or if they suspect kidney problems. It’s also used in ongoing care for conditions like chronic kidney disease, autoimmune disorders, or after certain treatments.

Sample Collection

A blood sample is drawn from a vein, usually in your arm. The blood is processed to separate the serum or plasma for testing. You may feel a slight pinch, but it’s typically quick and painless. Avoid strenuous activity or eating for a few hours before the test if instructed.

Test Results Interpretation

Results are compared to a baseline or previous measurements to identify trends. While specific reference ranges vary by lab, higher or lower levels than expected may signal potential health concerns that need further evaluation.